CHEYSICHTHYS. 



337 



2. CHRYSICHTHYS RUEPPELLI. 

 (Plate LX. fig. 2.) 



Chrysichthys auratus (non Geoffroy), Giinther, Cat. Fish. v. p. 71 (1864), and Petherick's Trav. 



ii. p. 229 (1869). 

 Chrysichthys auratus, part., Giinther, Proc. Zool. Soc. 1899, p. 718, fig. 1 *. 



Whilst provisionally accepting the division of the Nile Chrysichthys into two species, 

 as proposed by Giinther, I must differ from him as to the names they should bear, 

 it being evident, from an inspection of the plate in the ' Description de TEgypte,' that 

 the name auratus was intended by Geoffroy St. Hilaire to apply to the commoner form 

 with long and acutely pointed lobes to the caudal fin and a more or less produced ray 

 to the dorsal fin. I therefore propose the name rueppelli for the form named auratus 

 by Giinther. 



Measurements (in millimetres). 



Total length (without caudal) 



Greatest depth 



Length of head 



Width o£ head 



Length of snout 



Diameter of eye 



Interorbital width 



Width of mouth 



Length of nasal barbel 



„ maxillary barbel 



„ outer mandibular barbel 

 „ inner mandibular barbel 



,, dorsal spine 



„ first soft dorsal ray 



,, pectoral fin 



205 

 46 



58 

 46 

 21 

 11 

 26 

 32 

 6 

 38 

 26 

 18 

 25 

 47 

 34 



145 

 36 

 41 

 35 

 15 

 10 

 21 

 22 

 3 

 26 

 17 

 11 

 20 

 31 

 27 



142 

 37 

 42 

 34 

 13 

 9 

 20 

 20 

 3 

 29 

 16 

 12 

 20 

 32 

 28 



110 

 27 

 33 

 27 

 10 

 8 

 14 

 17 

 3 

 21 

 15 

 10 

 15 

 27 

 19 



* The figure of the dentition is taken from Eiippell's Nile specimen, but the remarks on specimens from 

 the Gold Coast (Eivers Prah and Offin) refer to a distinct fish with rugose head, narrower interocular 

 region, longer barbels, a shorter adipose dorsal fin, and longer, acutely pointed lobes to the caudal fin. 



2x 



