CHRYS1C11THTS. 325 



of head ; pttEemaxillaly band of teeth straight, 3 to 4 times as long 



as broad ; vomero-pterygoid teeth forming a narrow band interrupted 



in the middle, sometimes restricted to the vomerine part ; nasal barbel 



^ to f diameter of eye ; maxillary barbel f (adult) to once (young) length 



of head ; outer mandibular barbel about once and f as long as inner and 



f to f length of head. Gill-rakers moderate, 12 or 13 on lower part of 



anterior arch. Dorsal I 6, 1J to If times as distant from root of caudal 



as from end of snout ; spine feebly serrated behind, h to § length of 



head ; first or first and second soft rays longest, f to once length of head. 



Adipose dorsal not much longer than deep, its base \ to f that of rayed 



dorsal, from which it is separated by a space equal to 2 to 3 times its 



base. Anal 11-13, 7 or 8 rays branched. Pectoral about § length 



of head, spine smooth or very feebly serrated on outer side, strongly 



serrated on inner side. Caudal deeply forked, with long, acutely pointed 



lobes, the upper the longer and 3 to 4 times as long as middle rays. 



Caudal peduncle 1\ to If times as long as deep. Brown above, silvery 



white beneath. 



Total length 240 millim. 



West African Rivers, from the Gold Coast to the Ogowe. 



1-3. Yg., types. R. Prah, Gold Coast. R. 13. N. Walker, Esq. (('.). 



4. Yo-. 



5-7, 8. Yg. R. Offin, 



9. Ad., type of Gaboon. „ 



C. persimilis. 

 10-12. Hgr. & yg. Sette Cania, Gaboon. ,, 



13. Hgr., type of Ogowe. Miss Kingsley (G). 



C. kingsleyce. 



7. CHRYSIGETHYS AURATUS. 



Pimelodvs auratus, Geoffr. Descr. Egypte, Poiss. pi. xiv. tigs. 3 & 4 (1809). 



Porcus auratus, I. Geoffr. op. cit. p. 302 (1827). 



Abou Grata, Rifaud, Voy. Egypte, pi. cxcv. (1835). 



Bayrvs auratus, Riipp. N. Nacb.tr. Beschr. Fische Nil, p. 25 (1835) ; Cuv. & Val. 



Hist. Poiss. xiv. p. 427 (1839). 

 Bayrus capito, Cuv. & Val. t. c. p. 430. 

 ChryricMliys auratus, Bleek. Acta Soc. Sc. Ind.-Neerl. iv. 1858, p. 65 ; Bouleng. 



Fish. Nile, p. 333, pi. lx. fig. 1 (1907). 

 Clirysichthys capito, Bleek. 1. c. 

 Clirysichthys macrops, Gi'mtb. Cat. Fish. v. p. 71 (1864), Petherick's Trav. ii. p. 230 



(1869), and Proc. Zool. Soc. 1899, p. 719, fig. 2. 



Depth of body 3| to 5f times in total length, length of head 3£ to 



