122 



MOEMYEIDiE. 



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 IJ 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, i length of head, ventral ^ or 



rig. 101. 



Gnathonemus rJiynchophorus. 

 Type (A. M. C). f 



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

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



18-21 



■^ to f length of head. 75-85 scales in lateral line, ^-^ in transverse 

 series on body, ^jj^^y 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 o£ Upoto, Upper Congo. 



Capt. Wilverth (C). 



29. GNATHONEMUS IBIS. 

 Bouleng. Ann. Mus. Congo, Zool. ii. p. 25, pi. vii. fig. 4 (1902). 



Depth of body 4| to if times in totnl length, length of head 3|^ to 3|^ 

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

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

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



