478 SILUEJD.E. 



30. CHILOGLANIS. 



Peters, Mon. Berl. Ac. 18(38, p. 599 ; Bouleng. Ann. & Mag. N. H. (7) vi. 1900, 

 p. 521, and Fish. Nile, p. 386 (1907). 



Body moderately elongate, feebly depressed. Anterior dorsal entirely 

 in advance of ventrals, formed of 1 spine and 5 branched rays ; an 

 adipose fin opposed to the anal ; pectoral with a spine ; ventral with 7 

 rays. A cephalo-nuchal bony shield. Mouth inferior, surrounded by a 

 very large, circular, papillose lip ; conical teeth on the prsemaxillaries 

 and on the vomer ; movable, slender, curved teeth in the mandible ; a 

 maxillary and two mandibular barbels on each side ; nostrils rather 

 remote from each other, both with a valve, the anterior tubular ; eyes 

 small, without free border. Gill-openings short, confined to the sides. 

 Air-bladder small, partially enclosed on each side between the enlarged 

 processes of the anterior vertebrae. 



Vertebrae 35 (15-16 + 19-20). 



Nile and Tropical Africa. 



Synopsis of the Species. 



I. Maxillary barbel much longer than eye. 

 A. Dorsal with 5 branched rays. 



1. Depth of body 5|- to 6| times in total length ; caudal peduncle 2 to 2\ 



times as long as deep. 

 Interorbital width equal to or but slightly 



greater than distance between posterior 



nostril and eye ; base of adipose fin ^ to 



\ its distance from dorsal 1. C. dechenii, Peters, p. 479. 



Interorbital width much greater than distance 



between posterior nostril and eye ; base of 



adipose fin § its distance from dorsal . . 2. C. modjensis, Blgr., p. 480. 



2. Depth of body 4 to 5 times in total length ; caudal peduncle about 



I5 times as long as deep ; base of adipose fin § to § its distance from 

 dorsal. 

 Interorbital width greater than distance be- 

 tween posterior nostril and eye ; caudal 



deeply emarginate 3. C. neumanni, Blgr., p. 481. 



Interorbital width greater than distance be- 

 tween posterior nostril and eye ; caudal 

 feebly emarginate 4. C, eameronensis, Blgr., p. 482. 



