1899. J 



THOXr THE GOLD COAST. 



importaut points of agreement, such as the stoat habit of the body, 

 the very broad, short, depressed snout, the very wide mouth, the 

 long band ol: teeth on the palate, which exteuds on to the palatine 



Chrt/sichthys auratm. 



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. 



Chbysichthys maceops Gthr. 



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 I know, 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 Eiippell on the Lower Nile, and the six others col- 

 lected by Petheriek 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, showing a remarkable variation in the 



Fig. 2. 



155 min^. 



\QQTmru, 

 Chrysiehthys macrops. 



165 mmt. 



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 



