from the Gaboon and Gold Coast. Ill 



Clarias Gabonensis, sp. n. • 

 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 tin 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 Ogonie (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) . 



Gymnallabes, g.n. [Silur.). 



(Group Clariina.) 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 entiiely 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 II. fig. A. 

 D. ca 98. A. ca 82. 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. 



