DISTlCnODUS. 259 



Sc. 68-75 rTTTo' ^""^ between lateral line and 



ventral 6. D. maculattis, BJgr., p. 264. 



h. I). 22-27 ; A. 13-16. 



«. Interorbital width 1.^ to 1| times Icn^fth of snont in adult. 

 Sc, 68-75 -j^, 13-14 between lateral line and 



ventral; caudal peduncle much deeper 



than long ........... 7. /A petersli, Pfeff., p. 265. 



Sc. 60-66 t:£tC» 9-10 between lateral line and 



venl-ral ; caudal peduncle much deeper 



than long S. I), antoniu Schilth., p. 266. 



Sc. 68-77 5^, 10 between lateral line and 



ventral ; caudal peduncle as long as deep . 0. D. atroventralis, Blgr., p. 267. 

 /9. Interorbital width equal to or slightly greater than length of snout. 

 Sc. 67-70 — p-, 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. D. mossamhicus, Peters, p. 268. 



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

 lA-ib 



ventral ; base of dorsal not twice as long 

 as its distance from adipose fin ; maxillary 



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



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



ventral ; base of dorsal not twice as long 

 as its distance from adipose fin ; maxillary 

 extending to below nostrils 12. D. engi/ceplialus, Gthr., p. 211. 



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

 1d-26 



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

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



lateral line and ventral 13. D. hrevi/>innis, Gthr., p. 272 



D. 22-26 ; Sc. 90-110 1^, 15-18 between 



' 20-25 

 lateral line and ventral . 14. D. n'lloticufi, L., p. 273. 



D. 22-24; Sc. 83-98 jg^go' ^'^~^'^ between 



lateral line and ventral 15. 7>. rostrahis, Gthr., p. 275. 



B. Snout deeper than long, strongly compres^cd. 

 D. 24-25 ; A. 12-14 ; Sc. 60-68 |^, 11 



between lateral line and ventral . . . . 16. D. sexfasciatvs, Blgr., p. 276. 



C. Snout longer than deep, not compressed. 

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



between lateial line and ventral .... 17. 1). lusosso, Schilth.. p. 277. 



s2 



