84 



STNGNATHIDJE. 



rings, 3 of which belong to the trunk. Anal 2-3. Pectoral and caudal 

 fins well developed, but small. Brown ; snout more or less distinctly 

 spotted with black ; tail sometimes with dark annuli ; caudal blackish. 



Total length 170 millim. 

 Niger to Congo. 



1. 



Ad. 



2. 



Type 



3- 



-5. Ad 



6. 



Ad. 



7. 



Ad. 



Degama, Lower Niger. 

 Old Calabar. 



Benito R. 



Gaboon. 



Fresh-water lagoon, Ohiloaliero Town. 



Dr. W. J. Ansorge (C). 

 Dr. Hewan (C.) ; 



Dr. J. A. Smith (P.). 

 G. L. Bates, Esq. (C). 



Dr. W. J. Ansorge (C). 



Pig. CO. 





Dor;/ icli tli ys smith ii. 

 Benito E. i. 



3. CffiLONOTUS. 



Peters, Mon. Berl. Ac. 1855, p. 465, and Reise Mossamb. iv. p. 106 (1868) ; 

 A. Dam. Hist. Poiss. ii. p. 541 (1870) ; Giinth. Cat. Fish. viii. p. 188 

 (1870) ; Duncker, Mitth. Nat. Mus. Hamb. xxix. 1912, p. 230. 



Hemithylacus, Kanp, Cat. Lophobr. Fish, p. 61 (1856) ; A. Dum. t. c. p. 590. 



Body slender, much elongate, the caudal part much elongate ; only 

 one pair of strong ridges, the dorsal, which are continuous on the 

 trunk and tail. Dorsal fin partly on the trunk and partly on the tail. 

 Anal very small. Pectoral and caudal fins present. Brood-pouch of 

 the male occupying the whole belly, not completely covering the 



eggs- 

 Brackish and fresh waters of Madagascar, the Comoro Islands, and 



the Malay Archipelago. 



Two species in Africa : — 



Bony rings 17 + 38-39 ; D. 42, on 11 rings . . 



Bony rings 17-18 + 32-35; D. 53-62. on 12- 



rinfis 



1. C. argulus, Peters, p. 8. ; 

 •i 

 . 2. C. Uaspis, Blkr., p. 85. 



