514 MB. G. A. BOULENGER OK [May 8, 



21. SCHILBE SENEGALENSIS C. & V. 



22. Arius LAT1SCCTATUS Gthr. 



" Known as ' Wollinyaba.' It is used as food. Seen two 

 feet in length." 



23. Chrysiciithts cameronensis Gthr. 



24. Chrysichthys nigrodigitatus Lacep. 



25. Auchenoglanis biscutatus Geoffr. 



26. Synodontis clarias Hasselq. 



" Not very common ; taken several times at Nianimaru. Brilliant 

 red tail and a little red near the head. Native name ' Konn- 

 krikonng.' Not used as food." 



27. Synodontis gambiensis Gthr. 



" Called by the natives ' Kosso.' Was very abundant in the river. 

 Frequently when taken from the water made a faint cry. It is 

 seldom eaten by the natives. Dull grey." 



28. Synodontis ocellifer, sp. n. 



Praemaxillary teeth in several irregular series, forming a broad 

 band ; mandibular teeth 23 to 30, hooked, simple, measuring 

 barely one sixth the diameter of the eye. Depth of body 3 times 

 in total length, length of head 3§ times. Head slightly longer 

 than broad, convex on the occiput ; snout obtusely conical, 3 

 length of head ; eye supero-lateral, its diameter 5 times in length 

 of head, 1| to 1| in interorbital width; upper surface of head 

 moderately granulate from between the eyes ; frontal fontanelle 

 narrow. Occipito-nuchal shield obtusely tectiform, longer than 

 broad, granulate like the upper surface of the head, and termin- 

 ating in two obtuse processes. Gill-cleft not extending below- 

 base of pectoral. Maxillary barbel without distinct fringe, longer 

 than the head, reaching middle or posterior third of pectoral 

 spine; mandibular barbels with long, slender, simple branches, 

 inserted on a straight transverse line, outer nearly as long as the 

 head, once and two thirds as long as inner. Lips rather feebly 

 developed. Humeral process granulate, acutely pointed, extending 

 nearly as far as occipito-nuchal shield. Dorsal II 7 ; spine 

 strong, a little shorter than the head, curved, striated, with 12 or 

 13 feeble serrse behind in its upper half. Adipose fin 3 to 3| 

 times as long as deep, a little longer than the head, 4 to 5 times 

 as long as its distance from the dorsal. Anal IV 7-8. Pectoral 

 spine slightly longer than dorsal, striated, feebly serrated on the 

 outer edge, with 18 to 21 strong autrorse seme on the inner edge. 

 Ventral not reaching anal. Caudal deeply forked, with pointed 

 lobes, upper longest. Caudal peduncle as long as deep. Skin of 

 body smooth. Grey-brown above and on the sides, white beneath ; 

 body and adipose fin with large black-and-white ocellar spots 



