APPENDIX 
201 
eighteen were new additions ; and the discovery of genera like 
Ctenopoma, Haplochilus, Rhinoglanis, and the Indian Ophiocephalus 
in the upper parts of the Nile are points of the greatest interest. 
The British Museum has lately received numerous collections from 
West Africa; and a comparison of those fishes showed that a most 
intimate connection exists between these distant Faunas. This 
analogy has been noticed as early as the year 1834^ by Mr. Bennett, 
one of the Secretaries of the Zoological Society^ whose premature 
death was so great a loss to ichthyology. Proc- Zool. Soc./^ 1834^ 
p. 45.) I have thought it useful to indicate, in the list, whether 
the several species belong more properly to the Fauna of the Lower 
or Upper Nile, the first and sixth cataracts being made the boun- 
daries of the two courses. Mr. Petherick has collected at Cairo, 
Khartoum, Gondokoro, and on an affluent of the White Nile (B. 
il Gazal and Djoor) south of Gondokoro. His predecessors have 
collected chiefly on the lower parts of the river. 
LIST OF THE FISHES 
Lates niloticus , . . , 
Ctenopoma 'peilierici 
Mugil cephalus .... 
Mugil capito .... 
OF THE NILE.^ 
Lower Nile. Upper Nile. West Africa, 
XXX 
O X X 
X O X 
X o o 
* The mark o signifies that the species has not yet been found in a particular 
region. 
