208 
TEA.VELS IN CENTEAL AEEICA. 
The fishes of this genus are very similar^ and elosely allied to 
the Climbing Perch of the East Indies [Anahas ] . The habits are 
very probably similar^, although nothing positive is known regard- 
ing them. According to more recent observations the fishes pro- 
vided with a labyrinth-form appendage in the gill-cavity, appear 
to be as much dependent on air for breathing as on water. They 
are of small size, attaining to a length of about six or seven inches. 
Mr. Petherick has discovered a new species in the Upper Nile. 
Ctenopojna petherici, Gthr. (Plate I., Eig. A.) 
The height of the body is one-third, or a little more than one- 
third, of the total length (without caudal) ; the maxillary extends 
to below, or but slightly beyond, the anterior margin of the eye. 
Teeth in the jaws and on the palate in narrow bands. The diameter 
of the eye equals the extent of the snout. Five series of scales be- 
tween the orbit and the angle of the praeopercnlnm, the outer 
series covering the praeopercnlar margin. Operculum, inter- and 
suboperculum strongly serrated. The soft rays of the vertical fins 
covered with small scales. Brownish olive ; many scales with a 
brown central spot, these spots being less distinct in old specimens 
than in young ones ; a round black spot, sometimes edged with 
whitish, on the root of the tail. 
The largest specimen is six and a half inches long. Collected at 
Gondokoro. 
