GNATHONEMUS. 



Ill 



5 in upper jaw, 6 in lower ; eye moderate, ^ to f length of snout, f to 

 ^ interorbital width. Dorsal 25-30, originating above 6th to 9th ray of 

 anal, its length 2 to 2^ times in its distance from head. Anal 30-37, 

 equally distant from base of ventral and from base of caudal, or a 

 little nearer latter. Pectoral pointed, as long as head or a little 

 shorter, twice as long as ventral, reaching base of latter or beyond. 

 Caudal scaled in its basal J or f, with pointed lobes. Caudal peduncle 



Fig. 90. 



Giiathonemus cyprinoides. 



Fayum (F. N.). 



2J to 3 times as long as deep, as long as head or a little shorter. 70-86 



scales in lateral line. 



15-20 



12-18 



in transverse series on body, -^giis ^^ trans- 



=» 19-24 '^'^ i^xcii^o.^xo^ o^i^o^ wxx ^^^j, J2-18 



verse series between dorsal and anal, 16 (rarely 18) round caudal peduncle. 

 Silvery, back darker, bluish or greenish ; some young specimens with 

 small blackish spots scattered on the body. 



Total length 300 millim. 



Nile, from the Delta to the Bahr-el-Gebel, Chad Basin, Niger, Upper 

 Congo. 



Egypt. 



1. Ad. (Type o£ 



Af. ehngatus.') 

 2-3. Ad. & hgr. 

 4-5. Ad. 

 6-7. Ad. 

 8. Hgr. 

 9-10. Ad. 

 11-14. Ad. 



15. Ad. 



16. Skel. 



17. Ad. 



18. Ad. 



Lower Nile. 



Kafr-el-Zayat, Eosetta Nile. 



Barrage N. o£ Cairo. 



Cairo. 



Wasta, Lower Nile. 



Beni Souef, Lower Nile. 

 Between Beni Souef and Biba. 



Dr. Ruppell (C). 



S. S. Allen, Esq. (P.). 

 J. Petherick, Esq. (C). 

 L. Loat, Esq. (C). 



