94 



BULLETIN OF THE BUREAU OF FISHERIES, 



ATELEOBRACHIUM, new genus (Macrouridae). 



A remarkable pelagic form, distinguished by the strikingly pedunculated pectoral fins, and the 

 filamentous first dorsal and ventral fins. 



Body shaped like Macrourus , but short and deep. Barbel present, minute. Fine teeth in narrow 

 bands in jaws, none on vomer or palatines. First branchial arch with a membranous fold; a wide slit 

 behind fourth arch; gill rakers tuberclelike. Second dorsal spine and the succeeding rays elongate, 

 filamentous, the last 3 shortened. Ventrals widely separated, of filamentous rays, the outer ray appar- 

 ently detached. Pectoral inserted at the end of a long movable stalk, the base of which is slender, the 

 tip widening into a kidney-shaped lobe, aroimd the posterior margin of which the short rays are inserted. 



Type, Ateleobrachium pterotum, new species. (Fig. 37.) 



Fig. 37. — A teJeobrachium pterotum, new species. Type. 



Ateleobrachium pterotum, new species. 



Type about 90 mm. long, from station 4797, off Avatcha Bay, east coast of Kamchatka; taken with 

 intermediate net hauled at 300 fathoms. 



Measurements in hundredths of length from tip of snout to vent (22 mm.): Length of head 59; 

 length of snout 12; diameter of eye 16; interorbital width 15; length of maxillary 28; depth at origin 

 of dorsal 56; width of head 34; distance from tip of snout to front of dorsal 64; length of first dorsal 

 base ig; interval between dorsals 7; distance from tip of snout to base of ventrals 70; length of brachial 

 peduncle 21. 



