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378 PROCEEDINGS OF THE NATIONAL MUSEUM

ofcaudalj&non outlines ofcaudal peduncle, which are soconspicu- ousinstomataand hoUmanni. Instomatathereisanarrow rounded cutaneous flap, with conspicuous white margin, on lower edge of interopercle just beliind manchbular articulation. This is present, thoughsmaller, inhoUmanni, andisbarelyperceptible inmacrops.

H.stomatawasoriginally

known

from two specimens takenindeep water off

San

Diego. Ithassincebeen dredged by theAlbatross at a

number

of stations between Point Conception and BaUenas Bay,

Lower

California, these being thelimits of therange so far as

now

known.

The

depthatwhichithasbeentaken rangesfrom21 to 74 fathoms.

By

theexpeditionof 1904 asinglespecimenwasobtained at station4303,off

San

Diego, atadepthof21 to24 fathoms.

A

table of measurements of H. stomata, H. hollmanni, and H.

macropsis appendedforpurposesofcomparison.

Measurementsin hundredths oflengthwithoutcaudal.

Station 2977.

Macrops.

Valpa- raiso, Chile.

Lengthofhead

Lengthofsnout (fromupperorbit) Longest(oblique)diameterofupperorbit Lengthofmaxillary

Greatestwidthofmaxillary Greatestdepthofbody Leastdepthofcaudal peduncle Chordofarchof lateral line Lengthofpectoral Lengthofcaudal Lengthoflongest gill-raker

Numberof gill-rakersonouterarch Numberofdorsalrays Numberofanal rays Numberoftubesin lateral line Lengthinmillimeterstobaseofcaudal

11 10 3 43 10.5 19 IS 24 3.5 6-f-13 5-1-14 6"7 51 71 197

36 7.8 11.3 16.5 3.2 39

8 19 •

17 22.5

3.2 5+13

5-1-16 64 49 74 221

34.5 6.8 10.5 14

2.8 37.5 9 17.5 16 22 2.5 2+8 2+9 65 50 76 137

38.5 9 19 16

3+8 3+9

64 51 73 136

33.5 6.5 10.2 12.9 2.2 41

9.7 19 17 25 2.3 5+12 5+12 68 53

PLEURONICHTHYSVERTICALIS JordanandGilbert.

4420 4442

NO. 2075.

FISHES

FRO:\I

SOUTHERN CALIFORNIA—

GILBERT.

379

LEPIDOPSETTABILINEATA (Ayres).

OffSanNicolas Island

.

MontereyBay

Fathoms.

33-32 43-34

Not

hitherto reportedfromanypoint southofMonterey Bay.

MONOC^RATIAS, new genus

{Ceratiidae).

Mostcloselyalliedto Diceratias (bispinosus),differinginthe

much

less obliquemouth, in the absenceof the second cephalicspine, in thenakedskin, andin the presence of a strong outwardlydirected spine at the angle of the preopercle.

From

Oneirodes and Paro- neirodes,it isdistinguishedbythesingle dorsalspme.

Body

shortand deep, compressed, the

abdomen

subglobular, the occipital region elevated and strongly convex.

Mouth

of moderate size and

somewhat

oblique, with unequaldepressible teethin jaws and on vomer. Gills2§, the outer arch withoutfilaments. Dorsal spinesingle,the basaljointprocumbent, notconcealed; nocaruncles.

Skin with few scattered soft papillae ofsmall size. Pectoral multi- radiate. Gill-opening very wide,behind and belowbaseof pectoral.

Typeofthegenus.

—

Monoceratiasacanthias,

new

species.

MONOCERATIASACANTHIAS, newspecies.

Plate22,fig.24.

Type-specimen.

—

Cat. No. 75825, U.S.N.M., 80

mm.

long, from

station 4428, offSanta CruzIsland,Cal., depth764to891 fathoms.

Dorsal,6; anal,4; pectoral, 15; caudal,9.

Occipital regionelevated, its profilestrongly convex; interorbital fossawide and deep; supraorbitalrim wideningbehind,withaninner and anouterridge,the intervening surface gently concave; the inner pair of ridgeslow andparallel, boundingtheinterorbital fossa, the outerpair higher,stronglydivergent, eachendingina strongspine, directed obliquely upwards, outwards, and backwards; anteriorly, wherethetworidgesjoin,each rimis abruptly incurved, presenting anotched appearanceseenfrom above. Leastinterorbitalwidthat thenotchthree-tenths the distancebetween the supraorbitalspines.

Mouth

littleoblique,thelowerjawstrongly protrudingbeyondthe upper, ending in an acute symphyseal process. Mandibular teeth depressible, in a single irregularseries,longerandshorter teethalter- nating,13to15innumber; premaxillary teethlessthanhalfthesize ofthemandibularteeth,otherwisesimilar,awide medianarea tooth- less;

vomer

with3 teethoneachside, in a singleseries, themedian area naked; innervomerine teeth minute, the middlepair of each group a little larger, the outer pair about as large as the largest mandibularteeth.

380 PROCEEDINGS OF THE NATIONAL MUSEUM.

vol.48.

Two

interlocking spinesatthe angleofthepreopercle,the outeron the preopercle, directed outward and slightly downward, the inner on themandibular margin, directed backward andslightly upward.

A

well-developed

knob

atthearticulation ofthe maxillary. Rostral spinewith longfreebasaljointprojectingslightlybeyond theupper

lip, and half as longas theterminal joint, which reaches

when

de- pressedtoapointabovethemiddleoftheorbit; thefreeendissome-

what

enlarged, laterallycompressed,providedanteriorlywithalappet orcirrusandposteriorlywithashortfleshy process.

Upper

endofgill slitbehindmiddleof pectoral, theslitextending belowthefinfor

more

thanthewidthofthe pectoralbase.

PapiUsBminute, sparselydistributedeverywhere on head andbody.

Measurementsinhundredthsoflengthwithoutcaudal:

Lengthofmaxillary (fromarticulation) 34

Greatestdepthofbody 69

Lengthofhead 65

Leastinterorbitalwidth 10

Distancebetweensupraorbitalspines 26

Lengthof gillslit 22

Basaljoint of rostralspine 12

Terminaljoint of rostralspine 24

Distancefromtipofsnout to dorsal •. 75

Distancefromtip ofsnout to anal 84

Length fromtip ofsnout to baseofcaudal in millimeters 62

A

singlespecimenknown.

U.S. NATIONALMUSEUM PROCEEDINGS,VOL48 PL. 14

4 Y

1. Raja montereyensis. (Page307.) From theType.

^•

2. Xenognathus profundorum. (Page311.) From theType.

U.S.NATIONALMUSEUM PROCEEDINGS, VOL. 48 PL. 15

3.LampanyctusRiTTERi. (Paqe318.) From theType.

4. Zastomiasscintillans. (Page322.) From theType.

5. MelamphaesBiSPiNosus. (Page 325.t From theType.

U.S.NATIONALMUSEUM PROCEEDINGS,VOL. 48 PL.16

6. MELAMPHAESNYCTERINUS. (PAGE326.) FROM THETYPE.

<^^./t

7. Sebastodeszacentrus. (Page 331.)

Sebastodeswilsoni. (Page 333.i From theType.

U.S. NATIONALMUSEUM PROCEEDINGS,VOL. 48 PL. 17

9.ICELINUS FUSCESCENS. (PAGE340.) FROM THETYPE.

10.Xeneretmusleiops. (Page348.) From theType.

11.Xeneretmusritteri. (Page 350.) From theType.

U.S. NATIONALMUSEUM PROCEEDINGS,VOL. 48 PL. 18

ttit;'-''

-^CXv.-^c

'A„.

12. PARALIPARIS MENTO. (PAGE354.) FROM THETYPE.

13.Paraliparis ALBESCENS. (Paqe355.) From theType.

14. Paraliparis CAUDATUS. (Page356.) From theType.

U.S.NATIONALMUSEUM PROCEEDINGS,VOL. 48 PL.19

15. LiPARISCUSNANUS. IPAGE358.1 FROM THE TYPE.

16.EMBRYXPARALLELUS. (PAGE360.') FROM THETYPE.

17. Mayneacalifornica. (Page362.i From theType.

U.S.NATIONALMUSEUM PROCEEDINGS,VOL. 48 PL.20

18. Lycogrammabrunnea. .Page 364.)

19. BOTHROCARAREMIGERA. (PAGE 366.) FROM THETYPE.

20. Lycodapusmandibularis. (Page369.) From theType.

U.S.NATIONALMUSEU^ PROCEEDINGS VOL. 48 PL.21

21.Lycodapuslycodon. (Page371.) From theType.

€*'

22.Lycodapus attenuatus. (Page 372.) From theType.

.^^:^^

23, Nematonurusabyssorum. (Page 374.) From the Tyf

U.S. NATIONALMUSEUM PROCEEDINGS,VOL. 48 PL.22

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