Proceedings of the Biological Society of Washington

^i^

Vol. 37, pp.87-90 February21,1924

PROCEEDINGS

OFTHE

BIOLOGICAL SOCIETY OF WASHINGTON

((4 NOTES ON MOLLUSCAN NOMENCLATURE.

BY WILLIAM HEALEY DALL.

0,

^''o^/2J

Miise^^'

As

several

manuscript

reports

and memoirs, containing

inci-

dentally some changes

in

and additions

to

molluscan

classifica- tion

by the

writer,

have been

for

some time completed and are

likelyto

be

still further

delayed before publication

it is

thought best

to print

a

brief

preliminary note on the more important nomenclatorial

items.

Genus

Admete Kroyer,

new

section Microcancilla Dall; type

Admete

microscopica Dall, 1889.

Genus

Astyris H.

&

A.

Adams, new

section Fluella Dall; type Astyris

(Fluella) viduaDall, n.sp. Shell likeAstyrisbutspirallysculpturedwith- out conspicuous axial sculpture.

The

type is white

and

thin with an inflated

smooth

nucleus

and

aboutthreesubsequentwellroundedwhorls.

Length4

mm.

U.S.Nat.

Mus.

Cat.No.108002.

Deep

wateroffFlorida.

New

section PlectariaDall,typeAstyris(Plectaria)

crumena

Dall,n.sp.

Shell small, Hke Astyris but with predominant axial sculpture,

smooth

inflated nucleus,

and

veryfine spiral lineation.

The

type is white, with three wellroundedwhorls,4

mm.

long. U.S.Nat.

Mus.

Cat.No. 108006.

With

thelast. AstyrisalbellaC. B.

Adams, may

bereferredhere.

New

^sectionParasagenaDall;typeAstyris(Parasagena) georgianaDall, n. sp. Shell likeAstyris but with asharply cut openreticularsculpture.

The

typeistranslucent white,biconic, witha

smooth

inflatednucleus

and

about^fourmoderately convex subsequent whorls. Length5

mm.

U. S.

Nat.

Mus.

Cat.No. 108311.

Deep

wateroffGeorgia.

Thisspecies has a vitreous aspect

and

wideshallowreticulation.

Genus

Laskeya Iredale.

New

section

Onchodia

Dall; type Laskeyia (Onchodia) benthica^{Dall, n.sp.}

Deep

water forms witha swollen nuclear whorl, the nextwhorl

more

constricted, usuallyaxiallyribbedwithorwith- outspirallines, the following whorls stronglyaxially ribbed.

The

type is

glassy white, with about seven subsequentwhorls, fourteenribs

and two

spiral cords,beadedattheintersections. Length6

mm.

U.S.Nat.

Mus.

Cat. No. 108344. OffGeorgiaindeepwater,

common.

12—

Proc. Biol.Soc.Wash.,Vol.37,1924. (87)

88 Proceedings

of^theBiological Society of

Washington.

Genus

TrichotropisSowerby.

New

sectionIphinopsisDall,typeIphinoe kelseyi Dall, 1908,

San

Diego, Cal. Shell small, withoutthe hairy perio- stracumofIphinoe,butofsimilarform;deep waterspecies.

Genus

Megasystropha Lea, Jan. 1864; type Planorbis newherryi Lea,

1858+Canm/ea:

Binney,Sept., 1865.

Genus

Vorticifex

Meek

(Vortifex

by

typographical error), 1870, soleex- ample Carinifex (Vortifex) tryoni

Meek.

New

^{sectionParadines Dall, typeCarinifex hinneiji Meek, 1870. Plio-}

cene.

Genus

Orygoceras Brusina, 1882.

No

typeselected.

Section Orygocerass. s.

Type

0.cornucopiae Brusina. BalkanPliocene.

New

^{sectionIbicicornuDall.}

^Type

^{0. fistulaBrusina.}

New

section BovillinaDall.

Type

0.cornicukim Brusina.

New

section IncilicornuDall.

Type

0.leptonema Brusina.

New Genus

Payettia Dall.

Type

Latiadalli C. A. White, 1882. Plio- cene lakebedsoftheSnake River^valley,Idaho.

Genus

RochefortiaVelain.

New

^subgenusRochefortinaDall.

Type

R.semeleDall, n. sp. Beaks subcentral; external sculptureradial

and

concentric;a small prodissoconch;

hingeformula

p

q^{i qi}

Type

small, oval,with a minuteescutcheonbut nolunule;palliallineobscure; length3.2

mm.

U. S.Nat.

Mus.

Cat.

No.

333070. Oahu, H. T.

Genus

Tellina Linne.

New

^{subgenus Scissulina Dall.}

Type

T. disparConrad. 1837. Hinge of

Macoma,

the oblique sculpture onlyon onevalve.

Hawaiian

Islands.

Genus

CrassispiraSwainson.

New

^subgenus Ceritoturris Dall.

Type C?

bittium Dall, n. sp. Shell minute, recalling one of the minute brackish water species of Bittium.

Nucleus blunt, the second whorl with aperipheral keel

and

seven subse- quent moderately rounded, axially

and

spirally sculptured whorls, the canalalmostobsolete. Length7

mm.

U.S. Nat.

Mus.

Cat.No.338625.

Hawaiian

Ids.

Genus

Daphnohela Cossmann.

New

subgenus Carinapex Dall.

Type

Drillia minutissima Garrett, 1873. Hawaii.

Genus

TurriculaSchumacher,1817.

Subgenus? MordicaDall.

Type M.

brunoniaDall, n. sp.

Minute

shell with anabsurdly accurate resemblance tothe large species of Turricula;

with inflated whorls, constricted suture

and

relativelylong canal.

Type

withslender

brown

nucleusoffour longaxiallyribbed whorls

and

three

and

ahalfsubsequentinflated whorls;sevenaxialribs,

and

adeepanal sulcus close to the suture. Length 3

mm.

U. S. Nat.

Mus.

Cat. No. 338671.

HawaiianIslands.

Tritonoturris n. g. Dall.

Type

Clathurella robillardi Barclay, 1869.

Mauritius. Thishas obviouslynothingin

common

withClathurella.

Turrhyssan. g.

Type

Clathurellahicarinata Pease. Hawaiian Islands.

Questionablypleurotomoid. Ithas

much

the aspectofa minutePeristernia.

Dall — Notes on Molluscan Nomenclature. 89

Cryptomitran.subg.

Type

Pleurotomella?cUmacellaDaW,1895. Hawaiian Islands. Shell with obsolete plaitson thepillarin theearlierwhorls but noneinthelastwhorl.

Genus

Pisania Bivona.

Prodotian.subg.

Type

PisaniahilleheustiSouverbie, 1865. Nukahiva.

This ^is said to have the operculum likeFusinus. Anotherspeciesfrom the

Hawaiian

Islandsisdestitute ofan operculumaccordingtotheexperi- enceof

Mr. Thaanum, who

hastaken

two

alive.

Genus Murex

Linne.

Langfordia, n. subg.?

Type Murex

(Langfordia) cuspidifera Dall, n.

sp. Hawaiian Islands. Shell ofmoderate size, biconic,

somewhat

ofthe form of TrichotropiSy spirally sculptured, with about a dozen peripheral spines, the outer lip internally Urate, the siphonal fasciole imbricate, surroundinga conspicuous umbilicalpit. Height18

mm.

U.S.Nat.

Mus.

Cat.No.339422.

This combinesfeaturesofFavartia, Trophon,

and

Murex.

Neptunea ^Bolten.

Type

selected in 1918

by

Dall is Neptunea clnthrus Bo\ten,

= Murex

clathratusLinn6. Chrysodomus Swainson, 1840,istherefore retained for

Murex

antiquus Linne. Boreotrophon Sars. is

synonymous

withNeptunea.

CythnaCarpenter, 1864, isperhaps toberegardedas

homonymous

with Cithna A.

Adams,

1863. Inthat case the

name

Cythnoaissuggestedforthe later name.

Genus Gyrineum

Link.

New

^section GyrinellaDall.

Type

G. pusillum Broderip.

The

minutespecies with no sutural canal can hardly be appropriately placedinthe

same

sectionasthe

enormous

typeofthe genus.

Genus

TriphoraBlainville.

Strobiligeran. subg.

Type

Triphora {inflata var.)ibex Dall.

Antilles in deep water. Protoconch larger than the succeeding whorl, swollen, smooth; sutural sulcus feeble, canal short, open. There are

numerous

species inthedeep wateroftheAntilles. Sychar Hindsisofan entirely differenttype.

Lithariumn.subg.

Type

Triphora oceanidaDall,n.sp. HawaiianIds.

Shell dark brown, acute, rapidlyincreasing. Nucleus concentrated, with no obvious nepionic stage, blunt, with 12 subsequent whorls with three rows ^of beaded spiral sculpture, suture narrow

and

deep, sulci feeble.

Length 5

mm.

U. S. Nat.

Mus.

Cat. No. 333276.

Genus

Biitium (Leach)Gray.

Bittinella n. subg.

Type

Bittium hiloense Pilsbry

and

Vanatta, 1908.

HawaiianIslands.

Genus

Capulellanov.

Type

C.microcerasDall,n.sp.

Hawaiian

Islands.

Shell minute, recalHng the

much

largerCapulusliberatus Pease, from the Paumotus, ⁱⁿ which the whorls are separated. In the present species there are

two and

ahalfwhorls not separated, butthe circularapertureis entirely freethoughthereisnoumbilicalperforation.

Height1, diameter1.5

mm.

Bishop

Museum

Cat. No.65040.

Genus Eunatidna

Fischer.

90 Proceedings

ofthe Biological Society of

Washington.

New

sectionHeliconaticaDall, HawaiianIslands.

Type

E. margaritae- formis n. sp. Shell small, like

Marg

writes umbilicalis

Sowerby

in form, white, with a

brown

nucleus, sculptureof sharplyincised spiral lines, the pillar lipstraightwitha smallcallosityonitsedgenear thebody. Height 8;diameter 12

mm.

U.S. Nat.

Mus.

Cat. No.339171.

Genus

Solariella.

New

section Suavotrochus Dall.

Type

Solariella lubrica Dall, 1881.

Antilles indeepwater.

The

shellisnearlyorquitedestitute ofsculpture.