794 CALIFORNIA ACADEMY OF SCIENCES. 



convex; a slight depression before eye. Mouth large, 

 low, oblique, the lower jaw somewhat projecting. Pre- 

 maxillaries short; maxillaries long, expanded, the lower 

 edge curved, overlapping the dentary bones. Maxilla- 

 ries extending beyond eye, to angle of preopercle, as in 

 Sto/epkorus, their length if in head, their tip acutish. 

 Eye very large, 3 in head; snout 4. Bones of lower jaw 

 thin, broadly expanded, meeting across the throat at the 

 articular joint, leaving a club-shaped naked area under 

 the chin. Entire edge of maxillary armed with a single 

 series of slender sharp teeth, somewhat unequal, some of 

 them forming slender canines, which are however but 

 little longer than the other teeth and not fang-like. Teeth 

 in lower jaw similar, those of both jaws largely directed 

 forward. No teeth on vomer or tongue; a row of small 

 slender teeth on each palatine bone. No pseudobranch- 

 iae. Gill -rakers rather long and slender, about 5 + 17 in 

 number, the longest about half eve. Branchiostegals 

 short, 8 in number. Opercle short and thin; scarcely 

 striated; subopercle and interopercle developed. 



Photophores large and conspicuous, forming convex 

 pearly bodies on a dark background. Two series in a 

 straight line along lower part of sides, making four series 

 in all. The two lower series run from chin to the caudal 

 rin, 47 in each series, 10+13 + 9 + 8+7=47. The two 

 upper rows begin under chin at front of isthmus and ex- 

 tend to front of anal fin, 24 in each row, 10+13 + 11; 8 

 photophores along branchiostegal membranes, one for 

 each ray, all overlapped but not hidden by the broad 

 transparent rami of the lower jaw; one photophore on 

 preopercle, one on subopercle, one on preorbital, and 

 one at lower posterior margin of eye; 2 under tip of 

 chin. 



Dorsal fin low, inserted on posterior half of body, some- 



