little-known African Silurid Fis/tes. 525 



pointed humeral process. D. I ti ; spine striated, § length of 

 head. Adipose fin 3 times as long as deep, $ its distance 

 from rayed dorsal. A. 11 (2 rajs rudimentary). Pectoral 

 with a strong striated spine bearing 12 retrorse teeth on its 

 inner border, its length f that of head. Ventral nearly 

 reaching origin of anal. Caudal peduncle 1^ as long as 

 deep *. 



Total length 90 millim. 



The single specimen, preserved in the Paris Museum, is 

 from the falls of Doume, Upper Ogovve. 



4. Mochocus. 



Mochohus, Joannis, Mag. Zool. 1835, Poiss. ; Giinth. Cat. Fish, v 



p. 217 (1864). 

 Rhinofflanis, Giinth. t. c. p. 216. 



Body moderately elongate, slightly compressed. Anterior 

 dorsal ending over the ventrals, formed of a strong spine and 

 7 or 8 branched rays ; a second dorsal, formed of soft rays, 

 above the short anal ; pectoral with a strong spine ; ventral 

 with 7 rays. A cephalo-nuchal bony shield. Mouth sub- 

 inferior, without labial folds ; small conical teeth in both 

 jaws; a maxillary and two mandibular barbels on each side; 

 nostrils rather remote from each other, both with a valve, the 

 posterior very large ; eyes moderate, without free border. 

 Gill- clefts short, confined to the sides. Air-bladder lar^e. 

 free. 



1. Mochocus niloticus. 



Mochokus niloticus, Joannis, I. c. pi. viii. 



Rhinoglanis ti/pus, Giinth. I, c. p. 216, fig., and in Petherick's Trav. ii. 



p. 2*37 (1869). 

 Rhinoglanis Vannutellii, Vinciguerra, Ann. Mus. Genova, (2) xix. 1898, 



p. 254. 



Depth of body 5£ to 5f times in total length, length of 

 head 4 to 4^-. Head depressed, as long as broad, rugose 

 above ; a large frontal fontanelle ; eye directed upwards, 3 to 

 Z\ times in length of head, not much narrower than inter- 

 orbital width ; barbels long and slender, the maxillary reach- 

 ing end of pectoral spine or beyond. Anterior dorsal I 7—8 ; 

 spine nearly as long as head, with ascending serrte on anterior 

 border; second dorsal 10-15, about as long as its distance 

 from the first. Anal 9-10. Pectoral spine a little longer 



* The caudal fiu is injured in the type specimen; it was probably 

 notched or forked, not truncate, as figured by Sauvage. 



Ann. & Mag. N. Hist. 8er. 7. Vol. vi. 35 



