122 



MORMYBIDJE. 



which nearly equals diameter of eye ; latter § interorbital width ; lower 

 jaw with a compressed dermal appendage about as long as eye ; teeth 

 conical, 5 in upper jaw, 4 in lower. Dorsal 27-31, originating above 

 6th or 7th ray of anal, its length 1J to If times in its distance from 

 head. Anal 31— 35^ nearly equally distant from base of ventral and base 

 of caudal. Pectoral obtusely pointed, h length of head, ventral i 



or 



rig. ioi. 



Gnathone.mvx rhj/nehnphorus. 



Type (A. M. C). |. 



rather less; pectoral extending beyond base of ventral. Caudal scaled, 

 with pointed lobes. Caudal peduncle 3 to 3^ times as long as deep, 

 3- to i| length of head. 7-5-85 scales in lateral line, .^j^r, in transverse 

 series on body, |^j in transverse series between dorsal and anal, 16 or 

 18 round caudal peduncle. Brownish, with a rather indistinct darker 

 vertical band between dorsal and anal. 



Total length 380 millim. 



Congo. — Types in Congo Museum, Tervueren. 



1-2. Ad. & hgr., two of Upoto, Upper Congo. Cap! Wilverth (O.J. 



the types. 



3. Yg. Banzyville, Ubanghi. Capt. Royaux (C.). 



4-5. Yg. Stanley Pool. M. De Meuse (C). 



G. Hgr. Boma, Lower Congo. M. P. Delliez (C). 



7. Yg. Lower Congo. Bev. J. Pinnoek (C). 



29. GNATHONEMUS IBIS. 

 Bouleng. Ann. Mus. Congo, Zool. ii. p. 25, pi. vii. rig. 4 (l!'02j. 



Depth of body i\ to 4-f times in total length, length of head 3^ to 3$ 

 times. Snout produced into a long, strongly compressed and curved 

 tube, the length of which equals 2h to 3 times that of postocular part of 

 head and 8 to 10 limes its least depth; a compressed mental appendage, 



