DISTICHODUS. 275 



disappearing gradually with age ; vertical fins greyish, sometimes blackish 

 at the edge, the dorsal with numerous small round darker spots. 



Total length 700 millim. 



Nile, White Nile, Lake Rudolf. 



1. Ad. Nile. Dr. Riippell (C). 



2, 3-4. Ad. & yg. Lower Nile. J. Petherick, Esq. (C). 



5. Ad. Beni Souef, Lower Nile. L. Loat, Esq. (C). 



6. Yg. Near Luxor. „ 



7. Yg. Between Luxor and Assuaii. „ 



8-14. Ad. & yg. White Nile. J. Petherick, Esq. (C). 



15. Skel. „ )) 



16. Hgr. Jebelain, White Nile. L. Loat, Esq. (C). 

 17-23. Hgr. & yg. Fashoda, 



24. Ad. Mouth of Lake No, White 



Nile. 



25. Yg. Lake No, White Nile. „ 



26. Yg., type of D. Lake Rudolf. Dr. Donaldson Smith (C). 



rodolphi. 



15. DISTICHODUS ROSTRATUS. 

 Salmo niloticus, part., Linn, in Hasselq. Reise Palsest. p. 422 (1762). 

 Salmo cegyptiacus, part., Gmel. Syst. Nat. i. p. 1386 (1788). 

 Characinus nefasch, part., Lacep. Hist. Poiss. v. p. 274 (1803) ; Geoffr. Descr. 



Egypte, Poiss. p. 44, pi. v. fig. 1 (1809). 

 Citharinus nefasch, part., Rupp. Beschr. n. Fische Nil, p. 5 (1829). 

 Bistichodus nefasch, part., Guv. & Val. Hist. Poiss. xxii. p. 175 (1849). 

 Bistichodus rostratus, Giinth. Gat. Fish. v. p. 360 (1864), and Petherick 's Trav. ii. 

 p. 246, pi. iii. fig. B (1869) ; Bouleng. Ann. & Mag. N. H. (7) viii. 1901, 

 p. 513, and Fish. Nile, p. 143, pi. xxiii. fig. 2 (1907). 

 Distichodus martini, Steind. Sitzb. Ak. Wien, Ixi. i. 1870, p. 549, pi. iii. fig. 2. 



Very nearly related to the preceding, differing only in the somewhat 

 larger scales, 83-98 ^q, 13-15 between lateral line and ventral. 

 Coloration also the same. 

 Total length 620 millim. 



Lower Nile to Victoria Nile, Lake Chad, Senegal, Niger. 

 I Type. Lower Nile. J. Petherick, Esq. (C). 



2_ Yg. Beni Souef, Lower Nile. L. Loat, Esq. (C). 



3-4. Hgr. & yg. Near Luxor. j, 



5_ Y„ Kosheh, Upper Nile. „ 



g_ jj„r. Gondokoro, Bahr-el-Gebel. „ 



7. Head of ad. Fajao, Victoria Nile. J. S. Budgett, Esq. (P.). 



Lake Gbad. Capt. G. B. Gosling (P.). 



Hg 



t2 



