CHKYSICHTHYS. 325 



of head ; prEemaxillary 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 

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

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

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

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

 as from end of snout ; spine feebly serrated behind, | 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 f 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 millirn. 



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



R. B. N. Walker, Esq. (C). 



Miss Kingsley (C). 



7. CHRYSTCHTHYS AURATUS. 

 Pimelodus auratus, Geoff r. Descr. Egypte, Poiss. pi. xiv. tigs. 3 & 4 (1809). 

 Porcus auratus, I. Geoffr. op. cit. p. 302 (1 827). 

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

 Bagrvs auratus, Riipp. N. Nachtr. Beschr. Fische Nil, p. 25 (1835) ; Cuv. & Val. 



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

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

 Chrynchthjs auratus, Bleek. Acta Soc. Sc. Ind.-Necrl. iv. 1858, p. G5 ; Bouleng. 



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

 Ckrysichthys capito, Bleek. 1. c. 



Chrysichtliys mmrops, Giinth. Oat. Fish. v. p. 71 (1864), retherick's Trav. ii. p. 230 

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

 Depth of body of to 5^ times in total length, length of head 3^ to 



