420 On the Species q/ Poljpterus. 



scales along the body, 36-38 round the middle. No markings, 

 even in the young. 



Total length 300 millim. 



Nile, Lake Rudolf, Senegal, Gambia, Niger. 



A. B. C. D. 



1. Nile X o8 



2. „ IX 59 



3. ., X 59 



4. ;, IX 57 



5. „ IX 58 



6. Senegal X 58 



7. Gambia VIII 57 



8. „ X 58 



9. „ VIII 58 



10. Sierra Leone VIII 57 



11. Niger IX 57 



12. „ IX 67 



13. ,, X 59 



14. „ X 59 



15. „ X 55 



16. ., IX 56 



17. W. Africa X 57 



18. „ IX 58 



19. „ IX 58 



20. „ IX 58 



21. „ IX 57 



22. „ ,. .. IX 59 



23. „ X 56 If 



7. Polypterus palmas, Ayres. 



Head If to 2 as long as broad, i^ to 5§ times in total 

 length; interorbital region convex; all the head-shields 

 paired ; subopercle smaller than the eye ; snout projecting 

 slightly beyond the mandible. Dorsal spines 5 to 8, anterior 

 separated from each other when folded, 3 to 3^ times as long- 

 as broad. Pectoral widely separated from dorsal fin. 52 to 

 bb scales along the body, 36-38 round the middle. Above 

 with dark marblings enclosing light spots, these markings 

 more distinct in the young. 



Total length 290 millim. 



Liberia, Cape Palmas, Congo. 



This species is nearlycompletelycoimected with P.senegaJus, 



1. Lower Congo 



2. MaDgala, Upper Congo . 



5. Monsembe. Upper Congo 



6. Stanley Falls 



