1092 MR. G. A. BOULEXGER ON [Dec. 10, 



times as long as broad ; A-omerine teeth conical or subgranular, 

 forming a crescentic band which is as broad as or a little broader 

 than the prfemaxillary band ; nasal barbel f to f length of head ; 

 maxillary barbel as long as or a little shorter than head, not 

 reaching beyond middle of pectoral fin ; outer mandibular barbel 

 ■| to I length of head, inner | to I-. Gill-rakers moderately long, 

 10 to 12 on anterior arch. Clavicles hidden under the skin. 

 Dorsal 65-75, its distance from occipital process § to | length of 

 head. Anal 60-65. Both dorsal and anal narrowly sepai^ated 

 from caudal. Pectoral about | length of head, its spine feebly 

 serrated on both sides and i to | the length of the fin. Ventral 

 once and | to once and | as distant from root of caudal as from 

 end of snout. Caudal | to 5- length of head. Olive-brown above, 

 yellowish beneath ; anal with a light edge. 



Total length 205 millim. 



Ja and ISTyong Rivers, S. Cameroon. 



2. Allabenchelts loxgicauda. 



Boulenger, Proc. Zool. Soc. 1902, i. p. 234, pi. xxii. fig. 1. 



Depth of body 9 to 12 times in total length, length of head 5^ to 

 6 times. Head 1^ to Ig times as long as broad, smooth above, 

 the bony casque, in the middle of the head, ^ width of head ; 

 postorbital bone narrow; supraoccipital process acutely joointed ; a 

 small frontal fontanelle ; occipital fontanelle very indistinct ; eye 

 very small, 3 to 4 times in length of snout, 6 times in interorbital 

 width, which is not C[uite i length of head ; band of pra?maxillary 

 teeth 4 to 5 times as long as broad ; vomerine teeth conical or 

 subgranular, forming a crescentic band which is as broad as or 

 a little broader than the pra?maxillary band ; nasal barbel ^ to | 

 length of head ; maxillary barbel as long as or a little longer than 

 head, reaching middle or extremity of pectoral fin ; outer man- 

 dibular barbel f to once length of head, inner mandibular i to I-. 

 Gill-rakers moderately long, 10 to 12 on anterior arch. Clavicles 

 hidden under the skin. Dorsal 80-90, its distance from the 

 occipital process f to | length of head. Anal 60-75. Both 

 dorsal and anal very narrowly separated from caudal. Pectoi'al 

 i to f length of head, spine smootli or slightly serrated. Yentral 

 1| to 2 times distant from root of caudal as from end of snout. 

 Caudal about § length of head. Dark olive-brown above, whitish 

 beneath, anal with a light edge ; an ill-defined dark, light-edged 

 crescentic band on the caudal. 



Total length 280 milHm. 



Ja and Ivribi Rivers, S. Cameroon. 



3. Clariallabes. 



Boulenger, Ann. Mus. Congo, Zool. i. 1900, p. 136, and Poiss. 

 Bass. Congo, p. 262 (1901). 

 A single species. 



