412 ^EW FISHES FROM PA CIFIC OCEAK— GILBERT ^- CRAMER, vol. xix 



Photophores. — Mandibular, 3 i^airs in a curved line; operculars 2, the 

 upi)er elongated vertically and on a level with lower rim of orbit; pec- 

 torals 3, forming an acute triangle, the uppermost high up, on a level 

 with the lateral line, another at lower base of pectoral, and the third 

 iu front of and a little below the second; thoracic 5, tlie anterior pair 

 very close to middle line, the lirst 4 pairs nearly equidistant, the spots 

 of the fifth pair far apart, sei)arated by entire width of base of veu- 

 trals; supraveutral 1, high up, its distance below lateral line about 3 

 in orbit; ventrals 3, nearly eiiuidistant; snpraanaLs 4, in an elegant 

 curve, concave upward, the foremost a little above and behind the base 

 of ventral fin, the hindmost immediately under lateral line, a very little 

 behind first anterior anal spot ; anterior anals G, equidistant except the 

 first and second, which are a little farther apart; posterior anals 4, 

 equidistant, the distance between first posterior anal and last anterior 

 anal equal to distance between first and second anterior anals; poste- 

 rior lateral 1, immediately under lateral line and over last anterior 

 anal; caudals 2, tbe distance between them equal to distance between 

 anterior caudal spot and the hindermost spot of posterior anal series. 

 Photophores not divided into halves by dark bands. A small glandu- 

 lar patch on back of peduncle immediately in front of rudimentary 

 caudal rays. Postoibital part of head 2 in its whole lengtli. Origin 

 of first dorsal midway between tip of snout and anterior rudimentary 

 caudal rays. Distance between dorsals very little greater than dis- 

 tance between origin of anal and base of ventrals; from tip of snout to 

 base of ventrals a little less than from tip of snout to origin of dorsal. 

 Base of dorsal about 2^, base of anal Ij in head. Eays of all the fins 

 more or less injured; pectorals narrow, slender, very long, reaching 

 about to origin of anal. 



Color {i)i alcohol). — Scaleless partsof skin dusky to blackish brown. 

 Scales silvery, steel blue, iridescent; cheeks and opercles silvery, iri- 

 descent. Snout whitish. Base of caudal and anal and upper rays of 

 pectoral blackish; ventrals, lower short rays of pectoral, and distal 

 part of anal white; caudal, first dorsal, mouth cavity, and anterior 

 part of gill cavity dusky. Adipose dorsal white, black at base. Perito- 

 neum black. 



One specimen, 4 inches long, from station 3407; 310 fathoms. 



TyjJe.—^o. 47711, U.S.KM. 



DASYSCOPELUS PRISTILEPIS, new species. 

 (Plate XXXIX, fig. 1.) 



Head3f, ; depth 4;]^. D. 12 to 13; anal 18; pectoral about 17: ven- 

 trals 8; lateral line (pores) 35 to 38. 



Body elongate, compressed, heavy in front, its greatest width (over 

 the pectorals) lA in the depth. Depth at nape and at origin of 

 first dorsal equal; thence to the caudal the dorsal outline descends 

 gently and regularly, while the ventral outline ascends more rapidly 



