246 SILURID.E. 



conical, formino^ a curved band which is as broad as the praemaxillary 

 band; nasal barbel about f or f length of head, maxillary IJ to 1^, 

 outer mandibular once, inner mandibular f . Gill-rakers very few, 10 

 on anterior arch. Clavicles concealed under the skin. Dorsal 75-84; 

 its distance from occipital process f length of head, its distance from 

 caudal equal to or a little greater than diameter of eye. Anal 60-70, 

 also separated from the caudal. Pectoral ^ length of head, the 

 spine very feebly serrated on outer side and about f the length of 

 the fin. Ventral 1^ times as distant from base of caudal as from end 

 of snout. Caudal ^ length of head. Dark brown, lighter beneath ; a 

 dark, light-edged curved band on the caudal. 



Total length 210 millim. 



Cameroon. — Types in Berlin Museum. 

 1-2, 3-6. Ad. Ja River at Bitye, S. Cameroon. G. L. Bates, Esq. (C). 



Clarias neumanni, Hilgendorf, Zool, Jahrb., Syst. xxii. 1905, p. 409, 

 from the Guassa Nyiro R., flowing into the Ngnruman Salt-lake, Brit. 

 East Africa, described from an imperfect stuffed specimen, appears to 

 be nearly related to C. suhmarginatus, but the vomerine teeth form a 

 broader band in the middle. 



16. CLARIAS LIOCEPHALUS. 



Bouleng. Tr. Zool. Soc. xv. 1898, p. 24, pi. vii. fig. 2, Poiss. Bass. Congo, p. 257 

 (1901), and Proc. Zool. Soc. 1907, p. 1079. 



Depth of body 5^ to 7 times in total length, length of head 4^ or 5 

 times. Head Ij—l^ times as long as broad, smooth ; occipital process 

 angular; fontanelle feebly distinct, occipital in advance of occipital 

 process ; eyes small, 3 times in length of snout, 5 to 6 times in inter- 

 orbital width ; width of mouth equal to interorbital width, \ length of 

 head j vomerine teeth conical, forming a crescentic band which is about 

 as broad as the pra3maxillary band ; nasal barbel f to f length of head ; 

 maxillary barbel as long as head or a little longer, extending to middle 

 or extremity of pectoral ; outer mandibular barbel about 1|- length of 

 inner, which measures f to § length of head. 13 to 15 gill-rakers on 

 anterior arch. Clavicles not exposed. Dorsal 70-72, its distance from 

 occipital process f or | length of head, its distance from caudal greater 

 than diameter of eye. Anal 50-58, not reaching caudal. Pectoral 

 about \ length of head, the spine feeble, not serrated, about \ the 



