274 Dr. A. Giinther on Reptiles and Fishes 



The sp'ecimen described by Sauvage was considerably 

 laro-er than ours ; to this circumstance I am inclined to ascribe 

 the discrepancies between the two descriptions. 



Cynoglossus senegalensis, Kaup. 

 Lambarene. 



Clarias Walkeri, sp. n. (PI. XIV. fig. B.) 



D. 77. A. 56. P. 1/8. 



Vomerine teeth villiforrn, forming a rather narrow band, 

 without posterior projection, and as broad as the intermaxillary 

 band ; each half of the latter is twice as wide as broad, and 

 both the intermaxillary and vomerine bands have the same 

 lateral extent. Head covered above with smooth tliin skin, 

 scarcely any granulation being visible. The occipital process 

 projects as an isosceles triangle, the hind margin of the 

 head forming an open crescent on each side of the process. 

 The fontanelle is elongate, slightly encroaching upon the base 

 of the triangular process. The length of the head (measured 

 to the end of the process) is two ninths of the total (without 

 caudal) ; the width of the interorbital space is one half of the 

 length of the head. Barbels moderately long, that of the 

 nostril not reaching the gill-opening, and that of the max- 

 illary extending to the origin of the dorsal fin, which is 

 opposite to the end of the pectoral. Anal fin not Ipw. Ver- 

 tical fins separated from each other by a small interspace. 

 Coloration uniform blackish brown. 



millim. 



Total length 171 



„ „ without caudal 150 



Length of upperside of head i^5 



Width of interorbital space 18 



Diameter of the eye 27 



Ogowe River. 



Clarias gahonensis. 

 Clarias gahonensis, Giinth. Ann. & Mag. Nat. Hist. 1867, xx. p. 110. 



D. 76-78. A. 56-60. P. 1/10. 



Vomerine teeth villiform, forming a band which is a little 

 broader than the intermaxillary band, without posterior pro- 

 iection ; each half of the intermaxillary band is twice as 

 wide as it is broad, and laterally scarcely extends so far as 



