438 Mr. G. A. Boulenger on new 
another at the root of the caudal, and five or six dark vertical 
bars between them ; a small blackish spot at the origin of the 
dorsal fin. 
Total length 28 millim. 
Three specimens from the Ja River. 
Owing to the absence of barbels, this species needs compa- 
rison with one African species only, B. Brazzew, Pellegrin, 
from the Congo, which has 8 branched rays in the dorsal fin 
and 28 scales in the lateral line. 
Clarias pachynema. 
Depth of body 63 to 7 times in total length, length of head 
42 to 5 times. Head 12 to 14 as long as broad, smooth ; 
occipital process acutely pointed; frontal fontanelle sole- 
shaped, about twice as long as broad; occipital fontanelle 
smaller, in advance of occipital process; eye very small, its 
diameter 3 to 4 times in length of snout, 6 times in inter- 
orbital width, which equals about 2 length of head and ex- 
ceeds width of mouth; band of premaxillary teeth 23 to 3 
times as long as broad; vomerine teeth conical, forming a 
short curved band, which in the middle is as broad as the 
premaxillary band; barbels thick and papillose at the base ; 
nasal barbel ? to # length of head, maxillary 13 to 14, outer 
mandibular 14 to 14, inner mandibular 2 to #._ Gill-rakers 
few, about 15 on first arch. Clavicles concealed under the 
skin. Dorsal 92-95, its distance from the occipital process 2 
to 4 length of head. Anal 78-80. Dorsal and anal ex- 
tending to the very root of the caudal. Pectoral } length of 
head, the spine feebly serrated on both sides and 3 to } the 
length of the fin. Ventrals about 12 as far from the base of 
the caudal as from the end of the snout. Caudal $ length of 
head. Dark olive-brown above, yellowish beneath ; no light 
edge to the fins. 
Total length 175 to 255 millim. 
Three specimens from the Ja River. 
Compared with C. leviceps, Gill (Paris Museum specimen 
from the Gold Coast, described by Sauvage in 1882), C. pachy- 
nema differs in the longer barbels, the narrower mouth, the 
shorter space between the occiput and the dorsal fin, and the 
shorter body. C. Sale, Hubrecht, which I formerly regarded 
as identical with C. leviceps, has a longer head, finely granu- 
late above, a larger eye, the occipital process rounded or very 
obtusely pointed, and distinctly striated clavicles. These 
three species are very closely allied. 
