EXPLANATION OF PLATES

U. S, NATIONAL

MUSEUM

PROCEEDINGS, VOL.76,ART. 13 PL. ¹

»'=^S,

BryozoA OF .Galapagos islands

FOR EXPLANATION OF PLATE SEE PAGE FACING

U.S.NATIONAL

MUSEUM

PROCEEDINGS, VOL 76.ART. 13 PL.2

Bryozoa of Galapagos Islands

For explanation of plate see page facing

Plate 2

Figs. 1, 2. Schizopodrella (Stephanosella) biaperta Michelin, 1842 (p.16).

1. Portionofan incrusting ovicelled colony,

X

^20.

2. Structureofthefrontal,

X

85,showingthesmalltremopores.

Albatross Station D. 2813.

3-6. Dakariasertata, newspecies _{(p. 17).}

3. Incrusting zoarium,

X

20, showing the frontal of the zooeciaandthe ovicellwhich have thesamestructure.

4. Irregularzooeciain theancestrular region,

X

^20.

5. Thezooecia arepoorly oriented. Theperistomeisthickand festooned proximally;

X

^20.

6. Structureofthefrontalwith small tremopores,

X

^85.

Albatross Station D. 2813, and D.2815.

7-11. Hippomenellaparvicapitata, newspecies (p. 19).

7. Incrusting specimen,

X

^{20, showing the broad cells some}

ofwhich have no pleurocyst.

No

dietellae.

8.

An

example,

X

20, in which the narrow zooecia have only asingleavicularium.

9. Specimen,

X

^{20, showing the} ancestrula. The irregularity ofthesubstratum has determinedthedevelopment andan abnormaldirection ofthecells.

10. View bytransparency oftheembryo inthe ovicell,

X

85.

11.

A

^cellviewedbytransparencyshowingthe frontal structure, the ovicell,areolarporesand pleurocyst.

AlbatrossStationD. 2813.

63

Plate 3

Figs. 1, 2. Micropnrella gibbosula, new species (p. 20).

1. Incrusting specimen,

X

20, showing the micrometric varia- tionsfrom the ancestrula to the marginalzooecia.

2. Ovicelled specimen

much

calcified,

X

^20. Theformof the avicularia is alteredby theintensity of calcification.

Albatross StationD. 2813.

3-5. Microporellatradabilis, newspecies (p. 22).

3. Incrustingzoariumwithovicelled zooecia,

X

^20. Theovicells

havethesamestructure asthefrontal.

4.

An

example withsetiform avicularian mandibles,

X

20. The

pointofthe lattertouches the pivot of the aviculariumof theadjacentsuperiorzooecium.

5. Structure ofthe frontal, shown bytransparency,

X

85. The ascopore islargeandtriangular.

Albatross Station D. 2815.

6-11. Enantiosulamanica, newspecies(p.23).

6,6.^

Two

colonies, naturalsize, shov/ing theirrealposition.

7. Surface,

X

20, showing young zooecia with tubular tremo- pores.

8. Fragment of a lamella,

X

20, on which the tremocyst is

much

calcified andthefrontaltubulesare adjacent.

9. Portion of a transverse section of a colony,

X

^10, showing the superposedconcentric lamellae.

10. Marginofa lamella,

X

20, illustratingthe parietaldietellae

formedbeforethefrontal andtheaperture. Theavicularia arevisibleamongthedietellae.

11.

End

of a branch,

X

^20. The cells are

much

calcified and unadorned. Thetremoporesare closedbycostules.

Albatross StationD. 2815.

64

U.S, NATIONAL

MUSEUM

PROCEEDINGS.VOL 76,ART 13 PL.3

J*

^{•. -}

-«i;%J

.r.'.K^.v'*

ioT^i^.5r/»

BRYozoA OF Galapagos islands

For explanation of plate see page facing

U.S.NATIONAL

MUSEUM

PROCEEDINGS VOL.76.ART. 13 PL 4

Bryozoa of Galapagos islands

For explanation of plate see page facing

Plate 4

Figs. 1-5. Smiitina trispinosaJohnston, 1838 variety (p. 27).

1, 2. Zoarium, naturalsizeand baseofsame,

X

^2.

3. Another example,

X

20 with ovicelled zooecia, and also zooecia with small avicularia as well as thosewith large avicularia,ornamentedwith a mandible.

4. Zoarium,

X

20, in which tlie zooecia do not have large avicularia. The small avicularia are always elliptical;

sometimes some ofthem are triangular.

4.1 Zooecia,

X

20, without avicularia or only a single one present.

5. View by transparencj',

X

85, showing the arrangement of the cardeUesand ofthe lyrule in the aperture.

AlbatrossStation D. 2813.

6-8. Codonella granulaia, newspecies (p. 29).

6. Surface oftheincrustingspecimen withregular zooecia,

X

20.

7. Zoarium withirregular zooecia,

X

^20. The ^frontal granula- tionsare quitevisible betweenthetremopores.

8. Lateral wall of the zooecium showing the four uniporous septulae,

X

85.

AlbatrossStationD. 2815.

9-13. Pachycleithonia nigra, newspecies (p.25).

9. 10. Surface of the incrusting zoarium,

X

^{10 and several}

zooecia,

X

^20. The ectocyst persists on some of the zooecia asa tornfilm.

11. Interior,

X

20, showing the operculum in place in one zooecium and thecondylesand lateralcanals under the condylesin others.

12. Structure ofthe frontal,

X

^85.

13. Operculum, 85.

Albatross Station D. 2815.

65 61589—29 5

Plate 5

Fias. 1-4. Diplonotos coslulalum, newspecies (p. 30).

1,2. Fragment ofzoarium, naturalsize, andthe firstlateralface ofthereticulatedcolony,

X

20,bearingvibicesandavicu- laria.

3. Secondlateralfaceofthe sanaecolony

X

20,showingthesame features.

4. Cellularside,

X

^{20. It is uniserialand the zooecial openings}

arearranged ontheedgeofthe branchesinthefenestrae.

AlbatrossStation D. 2813.

5. Crepidacantha poissoniiKnAowva, 1826 (p.33).

Portionoftheincrustingzoarium,

X

^20.

Hawaiian Islands, Albatross Station D. 3813.

6-9. Adeonatubulifera, new species (page34).

6. Portion of the incrusting zoarium,

X

^{10, and a few zooecia}

ofthe same,

X

20, showinggonoecia.

7,8. Portionsofa colony

X

²⁰ with very tubularzooecia.

9.

Much

calcified colony,

X

20. The peristomes are shorter and

much

thickened.

Albatross StationD. 2815 and D. 2813.

66

U. S. NATIONAL

MUSEUM

PROCEEDINGS.VOL 76, ART 13 PL 5

Bryozoa of Galapagos islands

FOR EXPLANATION OF PLATE SEE PAGE FACING

U S NATIONAL

MUSEUM

PROCEEDINGS. VOL.76, ART. ¹³ PL 6

Bryozoaof Galapagos islands

FOR EXPLANATION OF PLATE SEE PAGE FACING

Plate 6 Fig. 1. Lageniporaverrucosa, newspecies (p.35).

Incrusting ovicelled specimen

X

20.

AlbatrossStation D. 2813.

2, 3. Lageniporamarginata, newspecies (p. 36).

2. Incrusting bi-triserial specimen,

X

20, The superior cells are operculated.

3.

An

example,

X

20,withlaciniatedand expandedperistomesof zooeciawith longperistomie.

Albatross StationD. 2813.

4-6. Holoporellaquadrispinosa, newspecies (p. 37).

4.

Two

colonies, natural size.

5. Orientedcellsofan incrusting colony,

X

^20. Therearesmall frontal avicularia.

6. Cumulatezooeciaofacolony,

X

^20. Thesmallfrontalavicu- lariaare buriedinthethicknessofthefrontal.

AlbatrossStation D. ²⁸¹³and D. 2815.

7-8. Holoporella porosa, newspecies (p. 39).

7.

Two

colonies developed on thesame nullipore, natural size.

8. Portionofa colony

X

20,showingtheovicellsand someoper- culated zooecia.

AlbatrossStation D.2815.

67

Plate 7

Fig. ^1. Holoporella hexagonalis, newspecies, (p.38).

1. Surfaceof the colony,

X

^20. Some zooecia are operculated.

AlbatrossStation D. 2813.

2, 3. Holoporellatridentculata Busk, 1881 (p. 39).

2. Themassive colony, naturalsize.

3. Surface ofalarge massive colony,

X

20, bearing cylindrical, salienttubes.

AlbatrossStationD. 2815.

4-8. Osthimosiaanaiina,newspecies (p.42).

4. Fragmentsoftheramose zoarium, naturalsize.

5. Ovicelledportion ofaramosecolony,

X

^20.

6. Portionofaramosecolony,

X

20, wherethe areolarporesare littlevisibleand theovicells arebroken.

7. Surface of a colony,

X

20, with large intcrzooecial avicularia ofduckbillshape.

8. Youngzooecia,

X

20,attheextremityofabranch.

Albatross Station D. 2813and D. 2S15.

68

U S NATIONAL

MUSEUM

PROCEEDINGS, VOL 76 ART 13 PL. 7

Bryozoa of Galapagos Islands

For explanation of plate see page facing

U. S.NATIONAU

MUSEUM

PROCEEDINGS.VOL 76.ART. 13 PL. 8

1

£^*7Wm-

"d

' * ^ • 't-

Bryozoa of Galapagos Islands

For explanation of plate see page facing

Plate 8

Figs. 1, 2. Hippoporidragranulosa,newspecies (p. 43).

1. Portionofanencrustingcolonywith oriented zooecia,

X

^20.

2. Anotherpartofthesamezoarium,

X

20,witherectandpoorly oriented zooecia.

AlbatrossStation D. 2813.

3-5. Hippotremaspiculifera, new species (p. 43).

3. The ramosezoarium, naturalsize.

4. Portioia ofafreecolony,

X

20, showingthe large interzooecial aviculariaandthefrontalspicules.

5. Zoarial surface,

X

20, showing the spicules placed on the frontalofthecells.

AlbatrossStation D. 2813.

6, 7. Microeciatubiabortiva, new^species (p. 48).

6.

An

^entirecolony,

X

^4,showingthe primitive Berenicea emit- tingvariouslobes.

7. Portion of the same colony,

X

^{12, showing the ovicell and}

thespaceswithabortedtubes.

Albatross Station D. 2813.

69

Plate 9 Figs. 1-3. Chaperiacondylata, newspecies (p. 44).

1. Theincrusting zoarium,

X

^10.

2. Portionofthesamesurface,

X

^20.

3. Zooecia,

X

20,preserving the six,large, simple,distal spines.

Albatross StationD. 2815.

4-6. Heteropora, species (p. 60).

Two

zoarianaturalsizeand,

X

^12.

AlbatrossStation D. 2813.

7-9. Cavaria praesens, newspecies (p. 58).

7. Zoariumnatural size.

8. The bereniceoid colony,

X

6, emitting cylindrical branches.

The mesoporesare biserialunderan epitheca.

Albatross Station D.2813.

70

U ^S. NATIONAL

MUSEUM

PROCEEDINGS, VOL 76.ART.13 PL 9

BRYOZOA OF GALAPAGOS ISLANDS

FOR EXPLANATION OF PLATE SEE PAGE FACING

U. S.NATIONAL

MUSEUM

PROCEEDINGS.VOL 76, ART 13 PL 10

Bryozoa of Galapagos Islands

For explanation of plate see page facing

Plate 10 Figs. 1-3. Diplonotos striatum, newspecies (p. 31).

1.

An

entire colonyand afragment, naturalsize. Thebranches show noncellular faces for the apertures are arranged laterally.

2. Noncellularsurface,

X

^{20, withsulci oflittle depth.}

3. Lateral cellular side of branch,

X

^{20, in which the enlarged}

portionsbearsalienttransverse vibices.

Albatross StationD. 3408.

4-8. Semihaswelliasulcosa, new species (p. 15).

4. Colony, naturalsize.

5. 6. Frontal cellular side,

X

¹² and a portion,

X

20, showing thelongitudinal sulci.

7,8. Dorsal side,

X

12 and

X

20, with longitudinal sulci and very smallvacuoles.

AlbatrossStation D. 3408.

71

Plate 11 Figs. 1, 2. Proboscinalamellifera, newspecies (p. 46).

Theincrusting zoarium,

X

^6anda portion

X

^12.

Albatross Station D. 2813.

3-6. Diaperoeciastriatula, newspecies (p.49)

.

3.

A

colony incrusting in concentric wrinkles with a wide basal lamellaand anovicell.

4.

An

example,

X

^{12, with} threeovicells.

5.

A

free colony,

X

^12.

6. Portionoffig. 5,

X

25, to show the concentricstriae.

AlbatrossStation D. 2813.

7, 8. Plagioecia lacteaCalvet, 1903, var (p. 48).

7.

A

completefreecolony,

X

^{12,with marginalovicell.}

8. Portion of the same,

X

^{25, to show the tubes closed by a}

diaphragm with tubule.

AlbatrossStation D. 2813.

72

U.S. NATIONAL

MUSEUM

PROCEEDINGS.VOL 76, ART 13 PL 11

Bryozoa of Galapagos Islands

For explanation of plate see page facing

U. S.NATIONAL

MUSEUM

PROCEEDINGS.VOL 76. ART. 13 PL. 12

Bryozoa of Galapagos islands

FOR EXPLANATION OF PLATE SEE PAGE FACING

Plate 12

Figs. 1-4. Diaperoecia? subpapyracea, newspecies (p. 50).

1. Superposedcolonies,

X

4,arisingfrom

many

successive larvae.

2.

A

large isolated colony,

X

^12, showing the arrangement of thetubesinradialrowsandthe largesmoothbasal lamella.

3.

A

small isolatedcolony,

X

^12, showing the irregular arrange-

ment ofthe peristomes.

4. Portion of an incrusting colony,

X

^12, illustrating the mar- ginal ovicell.

AlbatrossStation D. 2813.

5-9. Diaperoecia meandrina, new species (p. 51).

5. Superiorface,

X

4,showingthezoarial reticulations,the basal lamella, and the great saliency ofthe superior tubes.

6. Base of the same zoarium,

X

^4. The primitive Berenicea is visible,asisalsothepointofattachment.

7. Dorsalofayoungbranch,

X

^12. Itisformed fromtheprin- cipal branchby abifurcation ofthe basal lamellain which thetwoparts are attachedback to back.

8. Lateral face of anovicelled branch,

X

^{12, showing the inser-}

tion ofa secondary branch.

9. Lateral view of a young ovicelled branch,

X

^12, illustrating the growth of the basal lamella by the addition of new recurved tubes. Sometimes the tubes are closed by a diaphragm with a tubule.

Albatross Station D. 2815.

73

Plate 13

Figs. 1-10. Tubulipora UliaceaHarmer, 1898 (p. 54).

1. Incrusting colony,

X

^{12, commencing} inthe linear form.

2. Incrusting specimen,

X

12, showing the small protoecium.

the ovicell, and the oeciostome.

3. The initial linear portion,

X

^{12, of example shown in Fig-}

ure 1.

4, 5. Incrusting flabellate zoarium,

X

4, and

X

^12, the latter

showing the ovicell.

6. Bifurcated ovicelled specimen with linear branches,

X

^12.

Bancde Rokall, Spain (Atlantic).

7, 8. Incrusting specimen,

X

4 and a portion

X

^{12, showing the}

very small protoecium.

Atlantic, LaCroisic, Manche.

9. Another example with small protoecium,

X

^4.

English Channel, Etretat, France.

10. Incrustingcolony,

X

^12. Theovicellandthe oeciostomeare not entirely formed.

Albatross Station D. 2815.

74

LI S NATIONAL

MUSEUM

PROCEEDINGS. VOL 76. ART 13 PL. 13

Bryozoa of Galapagos islands

FOR EXPLANATION OF PLATE SEE PAGE FACING

U. S. NATIONAL

MUSEUM

PROCEEDINGS.VOL.76, ART. 13 PL. 14

Bryozoa of Galapagos islands

For explanation of plate see page facing

Plate 14

Figs. 1-4. Ttibulipora tubulifera Lamouroux, 1821 (p. 53).

1. Flabellatespecimen growingonanalga,

X

^12.

2. Linear specimen,

X

^{12, with} interrupted fascicles, incrust- ing an alga.

3. Linear ovicelled specimen,

X

^12, attached to an alga.

4. Dorsal face of a specimen,

X

^{12, showing the} cylindrical tubes.

Portod'Anzio, Italy.

5. Tubulipora, species (p. 54).

Small incrusting, ovicelled specimen with the oeciostome vis- ible,

X

^12.

Albatross Station D. 2813.

6. Tubulipora, species (p. 52).

Smallovicelledspecimen,

X

^25. The oeciostomeis recumbent andadjacent toa tube.

Albatross Station D. 2815.

7-12. DefranciastellaiaReuss, 1847 (p.57).

7.

An

example,

X

4, withsuperposed colonies.

Sahelian, Oran (Algeria).

8.

An

example,

X

^12.

Lower Miocene (Burdigalian), El Amran, Algeria.

9. Specimen attachedto a Cellepore.

Albatross Station D. 2815.

10-12. Specimens from the Helvetian (Miocene) of France.

76