Jordayi and Ever 77iann. — Fishes of North Auieriea. 2137 



quadrate projection over uiiddle slit. Disli small, uuder the oporcles and 

 I)osteiior part of cheeks, round in shape, slightly smaller than eye, its 

 diameter I length of head; vent separated from disk by about | diameter 

 of disk. Distance from vent to front of anal | its distance from tip of 

 snout. Body extremely slender, its depth at middle of total length equal- 

 ing diameter of eye, at base of caudal equaling | diameter of pupil. Dor- 

 sal beginning slightly behind axil of pectorals; distance from origin of 

 anal to tip of snout k its distance from base of caudal ; upper lobe of pec- 

 toral extending slightly past front of anal, the lower lobe to opposite the 

 vent; rays of lower lobe partly free; dorsal with about 51 rays, pectorals 

 with 29. Color nearly uniform dusky brownish, lighter on snout, belly, 

 and under side of head; mouth, gill cavity and peritoneum white. 

 Length 3 inches. Bering Sea north of Uualaska Island, in deep water. 

 {eKTSvrji, drawn out.) 



Careproclus eetencs, Gilbert, Kept. U. S. Fish Comm. 1893 (1896), 442, Bering Sea north 

 of Unalaska Island, at Albatross Station 3331, in 350 fathoms. 



788. GYRINICHTHYS, Gilbert. 

 Gyriniehthys, Gilbert, Kept. U. S. Fish Comm. 1893 (1896), 444 (minytremus). 



Teeth simple, not tricuspid. Body attenuate posteriorly, as in Paralip- 

 aris, the tail scarcely distinct. Disk small, under the posterior part of 

 the head, the vent immediately behind it. Pectorals without anterior 

 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. One species known. (xt^P'»'o?> tadpole; z'jOvj, fish.) 



2470. GYRIXICHTHTS MINYTREMUS, Gilbert. 



Body in the type greatly distended with eggs, the original shape difficult 

 to ascertain, tapering posteriorly into an extremely slender, compressed 

 tail. Head slender, not greatly depressed, the depth and width about 

 equal. Nuchal region not elevated, the profile rising but little behind the 

 snout, which is blunt, with almost vertical prolile. Mouth very small, 

 almost entirely transverse at end of snout, with but little lateral cleft, the 

 angle of mouth scarcely reaching Aertical from nostril; jaws even, the 

 snout very slightly protruding beyond premaxillaries. Teeth slender, 

 acicular, without cusps, the inner teeth longest; bands of teeth very 

 narrow, with but 5 or 6 oblique series in each half of each jaw; the 

 teeth directed backward, but scarcely depressible. Nostrils without 

 tube. Eye large, 14^ in total interorbital width, equaling length of 

 snout. Gill opening a small pore, scarcely larger than nostril, well sepa- 

 rated from upper margin of pectoral. Disk of moderate size, round, its 

 diameter equaling \ length of head; vent close behind disk, separated 

 from it by g its distance from front of anal fin. Pectoral small, its upper 

 edge on a level with lower margin of eye, the 2 fins converging under the 

 throat, the anterior rays progressively shortened, all included within 

 the membrane; dorsal without any detached anterior portion, beginning 

 well behind the head, at a distance from gill opening equaling I length of 

 3030 57 



