17. ALESTES. 313 



2. Alestes sethente. 

 Cuv. 8f Vol. xxii. p. 190. 

 D. 10. A. 22. V. 10. L. lat. 42. L. ransv. 9/3£. 

 Extremely similar to A. dentex, but with the teeth twice as strong, 

 and brown at the crown. The height of the body is contained thrice 

 and two-thirds in the total length (without caudal), the length of 

 the head thrice and three-fourths. 

 West Africa. 



a. Adult : not good state. Gambia. Presented by the Earl of Derby. 



3. Alestes kotschyi. 



Salmo niloticus, L. Syst. Nat. ed. 12. i. p. 514 (not Hasselq.). 

 Cyprinus deDtex, L. I. c. p. 531 (not Hasselq.). 



Myletes hasselquistii, Cuv. Regne Anim. 111. Poiss. pi. 103. fig. 1 (bad). 

 ? Myletes baremoze, Joannis, Chier. Mag. Zool. 1835, pi. 6. 

 Alestes kotschyi, Heckel, in Russegger, Reise, ii. part 3. p. 308. taf. 21. 

 fig. 4. 



D. 10. A. 26-28. V. 10. L. lat. 46. L. transv. 9i/34. 

 Vert. 24/23. 



The height of the body is two-ninths or less than one-fourth of 

 the total length (without caudal), the length of the head rather less 

 than one-fifth. Teeth not coloured. The pectoral fin terminates at 

 some distance from the root of the ventral. Body silvery. 



a-d. Fine specimens. Chartoum. From Consul Petherick's Collection. 



e-i. Adult. Lower Nile. From Consul Petherick's Collection. 



Tc-l. Adult. Nile. Presented by J. Burton, Esq. 



m-o. Half-grown. Nile. Presented by Dr. E. Ruppell. 



p. Adult : skeleton. Nile. From Dr. Ruppell's Collection. 



** Scales very large. 



4. Alestes macrolepidotus. 



Brycinus macrolepidotus, Cuv. fy Val. xxii. p. 157. pi. 639. 

 Alestes macrolepidotus, Bilharz, Sitzgsber. Acad. Wiss. Wien, 1852, iii. 

 taf. 37 ; Kner, Denkschr. Acad. Wiss. Wien, 1860, xviii. p. 19. 



D. 10. A. 16. V. 10. L. lat. 23. L. transv. 4/2. 



Teeth of the lower jaw with three or four points. The length of 

 the head is one-fourth, or somewhat less than one-fourth, of the total 

 (without caudal). Silvery, each scale with a darker base ; sometimes 

 a blackish spot behind the gill-opening, above the lateral line. 



Nile ; West Africa. 



a. Nineteen inches long. Nile. Presented by Dr. E. Biippell. 



b. Half-grown. Chartoum. From Consul Petherick's Collection. 



