540 NEW FISHES FROM PACIFIC COAST — GILBERT. 



Outer pectoral angles broadly rounded, placed more anteriorly than 

 in isotrachys. Anterior outline strongly undulated, very convex near 

 tip of snout, wliicli projects slightly beyond the profile. Snout very 

 broad, its anterior angle about 120 degrees. Length of disk (to opposite 

 posterior insertion of pectorals) 1^ in its width. luterorbital space con- 

 cave, 1^ times longitudinal diameter of eye, which is contained 3| times 

 in snout. Distance from front of eye to nearest point on margin of 

 disk If in length of snout (less than half snout in isotrachys). 



Teeth very small, each with a single minute cusp directed backwards, 

 eight oblique series in each half of upper jaw. 



Distance between gill openings of first pair, one-third length of disk 

 including the ventrals. Tail longer than body by half length of snout. 

 Dorsal fins small, of about equal size, covered with prickles. Base of 

 ventrals smooth above, a few prickles on distal half. 



Uniform plum-color above, slightly darker at margin of disk. Below 

 brown, lighter on body, becoming blackish on lateral margins of pec- 

 torals and ventrals. 



A single specimen, 18 inches long, from station 2923, in 822 fathoms. 



2. Catulus xaniurus sp. uov. 



Snout short and broadly rounded, much as in Catulus canescens Giin- 

 ther, the distance from snout to front of mouth one half greatest width 

 of snout, the latter equaling width of mouth. Nostril valves separate, 

 the width of isthmus nearly half width of nostrils, the valve with a 

 short cirrus. Distance from inner edge of nostrils to mouth one-third 

 their distance from tip of snout. Lips with a well- developed fold 

 around angle of mouth, that on lower jaw extending two sevenths to 

 one-fourth distance to symphysis, the fold on upper lip about half as 

 long as that on lower. 



Teeth small, acute, about five series functional in each jaw. Teeth 

 similar in both jaws, the median and the extreme lateral teeth much 

 reduced, those along greater extent of jaw with a prominent median 

 cusp, and two small lateral ones on each side. Towards angles of jaws, 

 the median cusps become much smaller and are little larger than the 

 lateral ones. 



Snout and sides of head soft, with numerous mucous pores, those on 

 lower side of snout in an oval patch. Eyes large, their horizontal 

 diameter more than half the interorbital width, or than distance from 

 tip of snout to their front margins. 



Anterior gill slit separated slightly more than the posterior ones, the 

 distance between them equaling length of slit. Last two gill slits above 

 the base of pectorals. 



Pectoral small, not notched, its angles rounded, a wide strip along 

 its upper posterior border devoid of prickles. Length of its anterior 

 border equaling that of snout and eye. Posterior margin of ventrals 

 very oblique. In one young male, 30 centimetres long, the claspers 



