148 TETRODONTIDJE. 



2. CHONERHINUS. 



Blcek. Atlas Iclithyol. v. p. 77 (18G5), part. ; Regan, Proc. Zool. Soc. 1902, 



p. 294. 

 Xeno]iterus, part., Giinth. Cat. Fish. viii. p. 270 (1870). 



Distinguished from Tetrodon by the higher number of dorsal (25-2G) 

 and anal (23-25) rays. Vertebras 24. 



One species from the rivers of Sumatra and Borneo and one from the 

 Congo. 



1. CHONERHINUS AFRICANUS. 

 Bonlcng. Cat. Poiss. Congo, Mus. Luxemb. p. 15 (1909). 



Body strongly compressed, its depth twice in total length. Head 1^ 

 times as long as broad, 3 times in total length; snout rounded, as loDg 

 as eye, 3 times in length of head ; interorbital width half length of 

 head ; nostril funnel-shaped, with fringed margin. Dorsal 25, origi- 

 nating at equal distance from nostril and from root of caudal, its border 

 convex, longest rays, in front, measuring § length of head, its base equal 

 to its distance from eye. Anal 23, similar to dorsal, but originating a 

 little further back. Caudal feebly emarginate. Caudal peduncle as 

 long as deep. Small spines, with bifid roots, on the belly. Uniform 

 brownish. 



Total length 65 millim. 



Sankuru Biver, Kasai, Congo. — Type in Luxemburg Museum. 



