99 
free from the isthmus and overlap each other. Pseudobranchiae 
present. Gillrakers long and numerous. No gular plate. 
Synopsis, of the menera. 
A, Scales well developed. Teeth on the palate. 
a, Teeth on intermaxilla, mandible and palatines only . Alepocephalus p. 99. 
b. Teeth also on the maxillary and vomer ....... Bathytroctes p. 101. 
ZB. Scales if present on lateral line, Palate toothless .... Aleposomus p. 104. 
1. Alepocephalus Risso. 
(Risso, Mém. de l’Acad. Sc. Torino XXV. 1820, p. 270). 
(Mhttchillena Jordan & Evermann). 
Oblong, compressed, covered with rather large, cycloid, 
deciduous scales, those of the lateral line tubular. Base of all 
fins invested by small scales. Head naked. Cleft of mouth of 
moderate width. Jaws nearly equal in front. A series of small 
teeth on intermaxillae, mandibles and palatines. Dorsal and 
anal rather short, their origin nearly opposite. Opercles large 
and thin, gillopening wide, partially covered by the entirely 
separate and overlapping gillmembranes and by a continuation 
of the skin of the head. Gillrakers numerous, close set and 
rather long. Pseudobranchiae present. Branchiostegals 6. 
Key tothe speeres. 
a. Eyes 5—6, more than one diameter apart; gillmembranes 
broadly overlapping: each) other 5). 16). > A. bicolor p. 99. 
b, Eyes 3'/,, half diameter apart; gillmembranes slightly 
VEE PIGS EACH GENCE. Sic) aiiat eluate < chide ss eats pce A. blanfordi p. 100. 
1. Alepocephalus bicolor Alc. 
Alepocephalus bicolor Alcock, Ann. Mag. Nat. Hist. (6) VIII. 1891, p. 133. — 
Descript. Cat. Indian Deep Sea Fishes, 1899, p. 169. 
Alepocephalus bicolor Brauer, Deutsche Tiefsee-Exp. Tiefseefische 1906, p. 19. 
Alepocephalus bicolor Max Weber, Siboga-Exp. Fische 1913, p. 10. 
re 
Laan 
Fig. 34. Alepocephalus bicolor Alc. 
. 
