. Bulletin - United States National Museum. Science. KEVISION OF THE FISH FAMILY LIPAKIDAE 133 nearly to the vent, in head. Disk large; the flap broad but not equal to the center of the disk; disk well forward under the head; distance from tip of lower jaw to disk in length without caudal. Vent separated from the disk by two-thirds diameter of disk, twice as far from the anal fin. Color pale, dusted with light brown; abdomen dusky; peritoneum dusky, possibly silvery in life. Synopsis.—Dorsal 43; anal 34; pectoral 34; caudal 10; pyloric coeca 19; body and head heavy, somewhat resembling
. Bulletin - United States National Museum. Science. KEVISION OF THE FISH FAMILY LIPAKIDAE 133 nearly to the vent, in head. Disk large; the flap broad but not equal to the center of the disk; disk well forward under the head; distance from tip of lower jaw to disk in length without caudal. Vent separated from the disk by two-thirds diameter of disk, twice as far from the anal fin. Color pale, dusted with light brown; abdomen dusky; peritoneum dusky, possibly silvery in life. Synopsis.—Dorsal 43; anal 34; pectoral 34; caudal 10; pyloric coeca 19; body and head heavy, somewhat resembling that of Liparis agassizii; depth in length without caudal; head Eye 6 in head; disk Teeth simple, lanceolate. Gill sht extending down in front of eight pectoral rays. Dorsal fin unnotched. Pec- toral fin notched; the lower lobe reaching nearly to the vent, in the head. Disk large, well forward under the head. Color pale,. Figure 53.—Careproctus opisthotkemus. Teeth from type dusted Avith light brown; peritoneum dusky, possibly discolored. One specimen, 318 mm. in length. CAREPROCTUS OPISTHOTREMUS Gilbert and Burke Careproctus opisthotremus Gilbert and Burke, 1912a, p. 78. Type.—^o. 74385, ; Alhatross Station 4780, among the Aleutian Islands, Bering Sea; depth 1,046 fathoms. Length 50 mm. Distribution.—Among the Aleutian Islands, Alhatross Station 4780; depth 1,046 fathoms. One specimen known. Relationships.—C. opistliotremus does aot appear to be closely allied to any known species. It is distinguished by the slender, depressed body, the position of the vent, and the gill slit extending down in front of the pectoral fin. Synopsis.—Dorsal 46?; anal 36?; pectoral 32; pyloric coeca 12. Body slender, elongate, head depressed; depth of body 6 in length without caudal; head Eye in head; disk , flat. Teeth simple, or few of the larger teeth with distinct lateral lobes. Gill slit extending down in front of five pectoral rays. Pectoral
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