1899. 



FROM THE GOLD COAST. 



719 



important points of agreement, such as the stout liahit of the body, 

 the ver}' broad, short, depressed snout, tlie very wide mouth, the 

 long band of teeth on the palate, which extends on to the pahitine 



Fie:. 1. 



Chri/sii-hthys auratus. 



bones, and the long adipose fin. A point of little significance is 

 the comparative length of the pectoral spine, which in the Prah 

 specimen is as long as the dorsal spine. 



CHRYSICHrHYS MACROPS Gtlir. 



Some specimens from West African localities which I formerly 

 referred to this species I am now, with more materials before me, 

 able to distinguish as distinct, so that, so far as Ikno^v, this species 

 seems to be restricted to the Nilotic system. There are seven 

 specimens in the collection of the Natural History Museum : one 

 obtained by Riippell on the Lower Nile, and the sis others col- 

 lected by Petherick at Khartoum ; one of the latter is made into a 

 skeleton. These specimens vary in length from 155 to 210 millim., 

 and are most instructive, showdns; a remarkable variation in the 



Fig. 2. 



155 mnv. 



Chrysichthys macrops. 



re 5 rarw. 



backward extent of the teeth of the palate, while all have the first 

 dorsal ray and upper caudal lobe prolonged into a filament. 



In none of the specimens is the dentition of the palate perfectly 

 symmetrical, the vomerine band on one side being sometimes longer 

 than on the other, or rudimentary palatine teeth being visible on 

 one side, which are entirely absent on the other. Palatine teeth 



