from the Ogowe River and Old Calabar. 275 



the vomerine band. Head naked above, finely granular and 

 striated. The occipital process triangular, with rounded end, 

 its base being a little longer than its sides. The fontanelle 

 is ovate, and does not encroach upon the base of the triangular 

 process. Length of the head one fourth of the total (without 

 caudal) ; snout contracted, the width of the interorbital space 

 being less than one half of the length of the head. Barbels 

 moderately long, that of the nostril reaching to the root of the 

 pectoral fin and that of the maxillary to the origin of the 

 dorsal, which is nearly opposite to the end of the pectoral. 

 Anal fin not low. Vertical fins separated from each other by 

 a small interspace. Coloration uniform blackish brown. 



millim. 



Total length 108 



„ ,, without caudal 148 



Length of upperside of the head 38 



Width of interorbital space 15 



Diameter of the eye 8 



This species inhabits also the Ogowe River. To facilitate 

 comparison with the other species here described, I have 

 given a fuller diagnosis than my former one. 



Clarias buthupogon. 



? Clarias Iceviceps, Gill, Proc. Ac. Nat. Sci. Philad. 1802, p. 189. 

 Clarias huthupoyon, Sauvage, Bull. Soc. Philoru. 1878, p. 90. 

 Clarias yabonensis (Clarias met/apoqon), Sauvage, N. Arch. Mus. iii. 

 1880, p. 39, pi. i. fig. 2 (not Gunth.). 



D. 84-87. A. 65-67. P. 1/8. 



Vomerine teeth villiform, forming a rather broad band, 

 without posterior projection, and as broad as the intermax- 

 illary 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 a very thin 

 skin and finely and rather sparsely granular. The occipital 

 process projects as an isosceles triangle, the hind margin of 

 the head being deeply notched on each side of the process. 

 The fontanelle is of an oval shape, its greater portion lying- 

 in advance of the base of the process. The length of the 

 head (measured to the end of the process) is two sevenths or 

 one fourth of the total (without caudal) : the width of the 

 interobital space is somewhat less than one half of the length 

 of the head. All the barbels very long, the nasal reaching 

 beyond the head and the maxillary beyond the origin of the 

 anal. Pectoral fin extending to the vertical from the first 

 dorsal ray. Anal tin low ; both the dorsal and ana! extend 



