SILURIDA!. 30^ 



7. CHRYSIOHTHYS AURATUS, Geoffr. 

 Pellegr. Poiss. Bass. Tchad, p. 98, fig. (1914). 



10. CHRYSIOHTHYS LONGIBARBIS, Blgr. 

 Add:— 

 5. Yg. Leopoldville. Messrs. Dubois and Mouchet (C). 



11a. CHRYSIOHTHYS THONNERI. 



Steind. Anz. Ak. "Wien, 1912, p. 446, and Deukschr. Ak. Wien, lxxxix. 1913, 

 p. 33, pi. v. 



Depth of body 4 to 4^ times in total length, length of head 2f to 

 2£ times. Head nearly 1^ times as long as broad, rugose above ; occipital 

 process a little longer than broad, in contact with the small interneural 

 shield ; snout rounded-subtruncate, nearly twice as broad as long ; eye 

 4| times in length of head, interorbital width 3| to 3| times; width 

 of mouth nearly twice in length of head ; praemaxillary band of teetli 

 very feebly curved, of to 5f times as long as broad ; teeth on palate 

 forming a long band, narrowly interrupted in the middle ; nasal barbel 

 5 to 5-§- times in length of head, maxillary 1^ to 1^, outer mandibular 1^ 

 to If, inner mandibular 3 J. Dorsal I 7, If times as distant from caudal 

 as from end of snout ; spine very feebly serrated behind in its upper half ; 

 first soft ray longest, as long as or a little longer than head. Adipose 

 dorsal a little shorter than its distance from rayed dorsal. Anal 12-13, 

 8-9 rays branched. Pectoral nearly § length of head ; spine strongly 

 serrated on inner border. Caudal deeply notched, longest rays about 

 twice as long as median. Caudal peduncle 1^ times as long as deep. 

 A dark band across occiput, another below anterior part of dorsal. 



Total length 235 millim. 



Ja River (Congo System), South Cameroon. — Types in Vienna 

 Museum. 



Apparently closely allied to C. duttoni. 



17. CHRYSIOHTHYS ORNATUS, Blgr. 



Steind. Denkschr. Ak. Wien, lxxxix. 1913, p. 35. 



Add:— 



4. Yg. Sankuru I\. at Kondue, Kasai. M. E. Lnja (C.) ; Luxemburg 



Museum (P.). 



