99 



% 



free from the isthmus and overlap each other. Pseudobranchiae 

 present. Gillrakers long and numerous. No gular plate. 



Synopsis of the genera. 



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. 



B. Scales if present on lateral line. Palate toothless .... Akposomus p. 104. 



i. Alepocephalus Risso. 



(Risso, Mem. de 1'Acad. Sc. Torino XXV. 1820, p. 270). 



(Mitchillina 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 to the species. 



a. Eyes 5 6, more than one diameter apart ; gillmembranes 



broadly overlapping each other A. bicolor p. 99. 



b. Eyes 3Va, half diameter apart; gillmembranes slightly 



overlapping each other A. blanfordi p. loo. 



i. Alepocephalus bicolor Ale. 



Alepocephahis 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. 



Fig. 34. Alepocephalus bicolor Ale. 



