444 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



97. Careproctus osteutum sp. nov. 



Differing from C. apectmm in the minute size of the sucking disk, which is reduced 

 to a mere rudiment entirely concealed by the auterior (lower) lobes of the pectoral 

 lins, about 1 mm. in diameter in a specimen 78 mm. long. The snout is longer and 

 more pointed than in C. ^yhasma or ('. spectrum, its width little greater than its 

 leugth, 2i in head. Month with very distinct lateral cleft, its width less than its 

 length. Maxillary reaching a vertical Hue crossing orl)it behind pupil, 1 v,, lu head. 

 Teeth miimte, in narrow bands, indistinctly tricuspid. Eye equaling length of snout, 

 H in total width of interorbital area. The true bony interorbital width is nmch 

 narrower than this. The epidermis of the head is largely lost, and the width of the 

 gill-slit can not be determined. A short nostril tube. Fins as in C, spectrum and 

 C. phasma. Skin loose, thinner than iu C. phasma. Color white or slightly brownish, 

 minutely punctulate with black. 



Three specimens from north of Unalaska Island, stations 3324 and 3331 ; depths 

 109 and 350 fathoms. 



98. Careproctus simus sp. nov. 



A species with very heavy head and body and inferior transverse mouth, over- 

 lapped by tho thick rounded snout. The appearance is much that of lihinoliparis 

 barbuJifer, but the anterior parts are niireh heavier, the nape more elevated, the 

 snout shorter and blunter, and the latter without barbels. The snout extends 

 beyond front of eyes for a distance (measured axially) equal to two-thirds diameter 

 of orbit, and projects beyond the mouth for one-half that distance. Mouth trans- 

 verse, its width nearly twice the distance from symjihysis of lower jaw to angle of 

 mouth, the latter reachiug a A^ertical midway between front of eye and pupil. 

 Teeth indistinctly tricuspid, in narrow bands, 11 or 12 series in each half of lower 

 jaw, 8 or 9 in the ujjper. Nostrils without tube. Eye large, one-third length of 

 head, equaling snout, li in total interorbital width. Gill-slit moderate, two-fifths 

 of it opposite upper pectoral rays, its width two-thirds diameter of eye. The 

 opercle is prolonged into an acute lobe overlapping middle of slit. 



Disk rather small, round, under posterior part of eye ; its diameter seven-ninths 

 that of eye. Vent immediately behind it, equidistant from front of anal and augle 

 of mouth. Pectorals inserted high, the upper edge on a level with the middle of 

 eye. The fin is continuous, the median rays greatly shortened, the lower ones again 

 longer, with exserted free tips. The upper lobe extends beyond front of anal and 

 equals length of head behind snout. The lower rays are two-thirds the length of 

 the upper ones. Pectoral with 33 rays. Origin of dorsal fin just behind axil of pec- 

 torals, continuous posteriorly with the caudal fin, which is very narrow and not 

 distinct. Origin of anal at end of first third of leugth. Whitish or light brown, 

 dusky posteriorly on body and fins. Mouth, gill-cavity, and peritoneum white. 



One 8i>ecimen, 80 mm. long, from north of Unalaska Island, station 3331 ; depth 

 3i)0 fathoms. 



GYRINICHTHYS gen. nov. (LIPARIDID^.) 



Teeth simple, not tricuspid. Body attenuate posteriorly, as in raraViparis, the 

 tail scarcely distinct. Disk small under the posterior part of the head; the vent 

 immediately behind it. Pectorals without auterior lobe, the rays progressively 

 shortened, none of them exserted or with free tips. Gill-openings reduced to a 

 minute round pore, well above base of pectorals. (Type G. minytrevins sp. nov.) 



99. Gyrinichthys minytremus sp. nov. 



Body in the type greatly distended with eggs; the original shape difficult to ascer- 

 tain, tapering posteriorly into an extremely slender compressed tail. Head slender, not 

 greatly depressed, the depth and width about eciual. Nuchal region not elevated, 

 the profile rising but little behind the snout, which is blunt, with almost vertical 

 profile. Mouth very small, almost entirely transverse at end of snout, with but little 

 lateral cleft, the angle of mouth scarcely reaching vortical from nostril. Jaws 



