454 
BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 
of the head. The maxillary extends slightly beyond the hind margin 
of the pupil. The outer premaxillary series of teeth are scarcely en- 
larged. There are six branchiostegals; a narrow free fold is formed 
behind the attachment of the gill-membranes. 
The location of the anus is subject to variation, its distance from 
the origin of the anal being contained 3.0 (2.0 to 3.7) times in the dis- 
tance from the anus to base of outer ventral. ray, a distance about 
equal to that from the ventral to the isthmus, and contained 1.15 
times (1.0 to 1.2) in the postorbital length of the head. , 
The ventral fossa in this species is a scaleless strip extending for- 
ward from the peritroct. Its shape is variable; in some specimens it 
is narrow and rectangular, of variable width, but is usually widest 
anteriorly, as in the type; in one specimen it has an obovate form; its 
surface is punctate. Above the fossa a peculiar organ is imbedded, 
resembling that of C. maculatus, but apparently differing from it in 
certain details: it is an elongate, flat body, darkly pigmented on its 
ventral surface, but wholly silvery on its dorsal surface; a strand of 
tissue, about as long as the organ, connects it with the peritroct. 
The organ has no skeletal support. 
Table of scale and ridge characters. 
Number of Tee 
Number Number ee penayos Nee distance 
ofrows of, Number of of scales Perainal aivnain aii ARGO nNiel between 
Albatross | Length of | scales | carinae on Oni int anarcls Piraorbitall Dp artiontotal occipital 
station. |head,mm.| above | scalesof | superior in postor- | ridge, ex- | P ae ridges in 
7 D > 1 PN ae 
lateral | body. —_— rostral | nitallength \cluding the | infraorbital)  , !2S¢. 
} line. 5) ridge. Gniead comenrel ridge interorbital 
2 | tubercle. width. 
5292 17 5s gre cree ee oe Salas Sere will cig moe Ga noe [sane tee ees ae Se eee eee er 
5291 20.5 53 3 9 6.0 6=6). | Seep 15:3 Smee er 
5291 28 54 5 9 5.5 7—6 10— 9 £27. 
5291 32 5% Hi 9 4.5 6 8— 9 1.6 
5297 40 54 6to 8 | 8 Li gue Pee ee 9 1.9 
5289 41 54 Sito. Z| 9 4.4 6—6 8—10 1.8 
5294 42 54 5to 7 9 5.0 6—7 8— 9 1.6 
5523 42.5 54 GO) eve 9 7.3 6—6 8— 9 ag 
5823 44 5 6to 8 9 5.0 6—6 10—10 1.8 
5297 44.5 54 7 to 10 8 6.0 6—6 8S— 8 17 
5297 45 53 7 8 552 7 8— 9 iby) 
5523 46 5s 7to 8 10 5.9 6—6 9—10 1.8 
5523 47 54 6to 8 10 6.0 7 8— 9 1.75 
5289 47.5 54 5to 9 10 5.5 } 7—7 9— 9 1.8 
5523 49 5 6to 8 9 5.6 | 6—6 9— 9 1.7 
5289 51 53 6to 9 9 6.0 7—7 10— 8 2.0 
5291 52 6 70, LO Neen ote na eee ee eee feats She Sten | Gaerne 127 
52941 Dee 54 7 to 10 10 7.0 | 7—6 9—8 1.8 
5269 54.7 54 7to 9 8 6.5 | 7-7 9— 8 1S 
5289 55 54 7toll 10 6.5 | 6—7 10— 9 1.85 
5289 63 54 6 to 10 8 8.0 6—7 9— 8 1.85 
1 Type. 
The spinous carinae of the scales do not approach, either in size 
or strength, those of C. maculatus, but are stronger than those of C. 
notatus. The rather weak spinules on the scales of the body are 
imbricate upon one another; the last spinule in each series projects 
but little beyond the margin of the scale; the 11 or fewer spinules 
on each of the carinae increase but little in strength posteriorly on 
