A a ere Ae ee oe ee 
from the Gaboon and Gold Coast. 111 
Clarias Gabonensis, sp. u. 
D. 76-78. <A. 56-60. 
Vomerine teeth villiform, forming a band which is about as 
broad as that of the intermaxillaries ; it has not a process behind 
in the middle of its concavity. Head finely granulated above, 
its length being one-fourth of the total (without caudal). Bar- 
bels long; those of the nostril extend to the base of the occi- 
pital process, those of the maxillary beyond the origin of the 
dorsal. The pectoral fin extends to, or somewhat beyond, the 
vertical from the origin of the dorsal ; its spine is at least three- 
fourths as long as the fin. The dorsal extends to the root of 
the caudal. Snout somewhat narrowed in front. 
River Ogome (Mr. Walker). 7 inches long. 
This species may prove to be identical with Clarias angolensis 
of Dr. Steindachner, who, however, has omitted to give the 
formula of the fin-rays, so that it is impossible to determine 
our specimens from his description. 
Heterobranchus isopterus (Blkr.). 
Bossumprah River (Mr. Ussher). 
GyYMNALLABES, g.n. (Si/ur.). 
(Group Cuarimna.) Adipose fin none; dorsal and anal fins 
very long (confluent with the caudal*). Jaws with a band of 
villiform teeth ; a crescent-shaped~-band of similar teeth across 
the vomer ; cleft of the mouth transverse, anterior, of moderate 
width; eight barbels, as in Clarias. Eyes very small. Head 
covered entirely with soft skin, the lateral parts especially mus- 
cular and soft. The postbranchial cavity is present; but the 
accessory organ is reduced to a simple securiform process of the 
second and third arches. Pectoral and ventral fins very small, 
the former with a pungent spine, the latter five-rayed. 
Gymnallabes typus, sp.n. Plate IL. fig. A. 
D.ca 98. A.ca82. C. 12. 
The height of the body is one-sixteenth or one-fifteenth of 
the total length (without caudal), the length of the head one- 
ninth or one-tenth. Head much depressed, flat, swollen on the 
temples, two-thirds as broad as long. Nasal and outer mandi- 
bulary barbels not quite as long as those of the maxillary; the 
latter are longer, and the inner of the mandible shorter, than 
the head. Uniform brownish black. 
West Africa, probably Old Calabar. 7 inches long. 
* This is perhaps merely a specific character, as in Clarias. 
