HTDHOCYON. 



1S1 



lateral line and scaly process at base of ventral. Back grey, brown, or 

 olive-green, sides and belly silvery white ; more or less distinct longitu- 

 dinal rows of blackish spots, often confluent into streaks, run along the 

 series of scales above the lateral line, and, exceptionally, also along 

 the series bordering the lateral line below ; these spots or streaks 

 entirely absent in very young specimens ; dorsal fin and upper lobe of 



Hydrocyon forshalii. 

 Upper Nile (F. N.). j. 



caudal yellowish or grey, often blackish towards the end ; adipose fin 

 grey or whitish, rarely with a black spot ; ventral and anal, sometimes 

 also pectorals, tinged with pink or pale orange ; lower lobe of caudal 

 bright red. 



Total length 450 millim. — Grows to nearly 1 metre. 



Lower Nile to Blue Nile and Lake Albert; Lakes Rudolf and 

 Gandjule (Margherita) ; Senegal, Niger. — Type in Paris Museum. 



Dr. Ruppell (0.). 

 J. Petherick, Esq. (C). 

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

 L. Loat, Esq. (C). 



1. Hgr. 





Egypt. 



2. Hgr. 





Lower Nile. 



3. Skel. 





?} 



4. Hgr. 





Lake Edkou. 



5. Hgr. 





Damietta Nile. 



6, 7, 8. Ad. 



» h g r -> 



Near Cairo. 



&yg- 







9. Skel. 





5> 



10. Ad. 





Wasta, Lower Nile. 



11-16. Hgr. 



& yg- 



Beni Souef, Lower Nile. 



17. Ad. 





Sanhur, near Beni Souef. 



18. Hgr. 





Bahr Selah, Fayum. 



19-20. Hgr. 





Between Assiut and Abu Tig, 

 Lower Nile. 



21-30. Hgr. 



& yg- 



Near Luxor. 



31-39. Yg. 





Between Luxor and Assuan. 



40-43. Hgr. 





Assuan. 



