408 NEW FISHES FROM PACIFIC OCEAN— GILBERT^- CRAMER, vol. xix 



tip of snout to base of ventrals 2.i, from vent to origin of anal 4, in 

 length of body. Faint traces of dark cross bands on body and tail. 



Six specimens, 3^ to 7 inches long, from stations 3475 and 3470 ; XA 

 and 298 fathoms, respectively. 



Type.—So. 47715, U.S.X.M. 



Family MYCTOPIIID.F. 



DIAPHUS UROLAMPUS, new species. 

 (I'hitr XXX VIII, lig. I.) 



HeadSfj depth 4;|. \). 14 to 15; A. 14 or 15; P. 15; V. 8: lateral 

 line about 29 to 35. 



Body elongate, compressed, its width 2 in its depth : least dci)th of 

 peduncle 2f in greatest depth of trunk. Dorsal and ventral outlines 

 nearly similar, the former highest at origin of first dorsal fin. The 

 depth at the nape \Qvy nearly e(|ual to the depth at origin of first 

 dorsal J depth at origin of anal l.\ m this distance. Head stout, com- 

 pressed, its dorsal outline i)arabolic, its greatest width over preopercle 

 li, and its width at anterior rim of orbit 2? in its greatest depth. 

 Orbit moderate, circular, 3j^ in head. Interorbital space a little convex, 

 broad, equal to orbit. Snout steep, blunt, short, 2 in orbit, its lip 

 nearly on a level with the center of the eye. A slight median ridge 

 running up on to the interorbital space. Mouth very large, somewhat 

 oblique, curved upward a little in front of orbit; maxillary slender, 

 but little expanded posteriorly, 1| in head, reaching about two-fifths 

 of its own length beyond posterior rim of orbit. Teeth in narrow 

 bands on jaws, vomer, and palatines. The sharp edges of the rami of 

 the lower jaw nearly meeting in median ventral line. Xostrils about 

 on a level with center of eye, the anterior opening about midway 

 between tip of snout and anterior margin of orbit, much smaller 

 than posterior opening. Posterior margin of preoi)ercle very oblique. 

 Opercle thin with a triangular lobe reaching about to base of pectoral; 

 a little incurved above and below the lobe, scarcely covering the gills. 

 Fourteen rakers on horizontal limb of anterior arch, the longest a 

 little less than 2 in orbit. Bones of head thin, fiexible; a ridge behnid 

 eye terminates in a rather strong spine at upper angl(», of i)reopercle. 



Scales thin, cycloid, deciduous; 4 in a transverse series between 

 lateral line and origin of first dorsal. 



Pliotophores. — Mandibulars 4 pairs, very indistinct: operculars 2, the 

 upper on level of base of pectoral fin, the lower minute, just behind 

 angle of jaws; pectorals 3, the first immediately beh)W lateral line, the 

 second immediately in front of and below base of pectoral fin, the third 

 nearly midway between this and the foremost thoracic spot: the second 

 of these spots forms an obtuse angle with reference to the other two; 

 thoracic 5, the first and second pairs far apart, the second i)air nearly 

 midway between first and fifth pairs, the fourth far up on the sides 



