DisTicnoDUS. 259- 



Sc. 68-75 f^Tp' "^-8 between lateral line and 



ventral 6. 1). maculatus, Blgr., p. 264. 



b. D. 22-27 ; A. 13-16. 



«. Interorbital width 1£ to 1§ times length of snout in adult. 

 Sc. 68-75 ||, 13-14 between lateral line and 



ventral; caudal peduncle much deeper 



than long 7.1). petersii, Pfeff., p. 265. 



Sc. 60-66 jt||, 9-10 between lateral line and 



ventral ; caudal peduncle much deeper 



than long 8. D. antonii, Schilth., p. 'I'oCk 



•Sc. 68-77 1 r ^4t, 10 between lateral line and 



ventral ; caudal peduncle as long as deep. 9. D. atroventralis, Blgr., p. 267. 

 ft. Interorbital width equal to or slightly greater than length of snout. 

 Sc. 67-70 i^, 11-12 between lateral line and 



ventral ; base of dorsal twice as long as 



its distance from adipose fin ; maxillary 



not extending to below nostrils .... 10. I), mossamoicus, Peters, p. 268. 

 Sc. 66-78 ., ,",.. , 10-11 between lateral line and 



ventral ; base of dorsal not twice as long 



as its distance from adipose fin ; maxillary 



extending to below nostrils 11. D. fasciolatus, Blgr., p. 270. 



Sc. 75-85 - ~l , 11-12 between lateral line and 



lo-li 



ventral ; base of dorsal not twice as long 

 as its distance from adipose fin ; maxillary 

 extending to below nostrils 12. D. engycephalus, Gthr., p. 271. 



2. Scales 80-110 ^?, 13-20 between lateral line and root of ventral ; 

 A. 13-15 ; interorbital width much greater than length of snout. 

 D. 20-23 ; Sc. 80-91 "^°, 18-20 between 



lateral line and ventral 13. JJ. brevipinnis, Gthr., p. 272 



D. 22-26 ; Sc. 90-110 S, 15-18 between 



*u-25' 

 lateral line and ventral 14. D. niloticus, L., p. 273. 



D. 22-24; Sc. 83-98 jjjjj, 13-15 between 



lateral line and ventral 15. D. rostratvs, Gthr., p. 275. 



B. Snout deeper than long, strongly compres-od. 

 D. 24-25 ; A. 12-14 ; Sc. 60-68 it" 11 



14-16 



between lateral line and ventral .... 16. D. sex/asciatits, Blgr., p. 276. 

 G. Snout longer than deep, not compressed. 

 D. 24-26 ; A. 13-14 ; Sc. 70-85 j|=j|, 11-13 



between lateral line and ventral . . . .17. J), lusosso, Schilth., p. 27?. 



«s 2 



