GNATHOJSTEMUS. 



123 



measuring J diameter of eye ; teeth conical, 6-8 in upper jaw, 4 in lower ; 

 eye rather large. Dorsal 32-33, originating above 6th or 7th ray of anal, 

 its length once and § in its distance from head. Anal 36-37, a little 

 nearer base of caudal than base of ventral. Pectoral pointed, as long as 



Fig. 102. 







Gnathonemus ibis. 

 Type (A. M. C). f 



head without rostrum, nearly reaching end of ventral. Caudal partly 

 covered with scales, with pointed lobes. Caudal peduncle 3 times as 



-1 g 



long as deep, shorter than pectoral. 77-82 scales in lateral line, 25:27 

 in transverse series on body, j^^ in transverse series between dorsal and 

 anal, 16 round caudal peduncle. Dark brown ; two blackish vertical 

 bands, separated by a light interspace, between dorsal and anal ; fins 

 blackish. 



Total length 150 millim. 



Ubanghi. — Type in Congo Museum, Tervueren. 

 1. One of the types. Banzyville. Capt. Royaux (C). 



30. GNATHONEMUS CURVIROSTRIS. 

 Bouleng. Ann. Mu«. Congo, Zool. i. p. 13, pi. vi. fig. 1 (1898), Proc. Zool. Soc. 

 1898, p. 811, and Toiss. Bass. Congo, p. 106 (1901). 

 Depth of body 4f times in total length, length of head SJ times. 

 Upper profile of head descending in a strong curve ; snout much pro- 

 longed, tubiform, strongly compressed, curved downwards, its length 3J 

 times postocular part of head, and 12 times its least depth, which a Httle 

 exceeds diameter of eye ; latter slightly more than i interorbital width ; 

 lower jaw with a compressed dermal appendage IJ diameters of eye ; 

 teeth conical, 3 in upper jaw, 4 in lower. Dorsal 32, originating above 



