11. LABEO. 49 



h i. Five to seven inches long. Chartoum. From Mr. Petherick's 



Collection. 

 Ic. Nino inches long. Goiulokoro. From Mr. Petherick's Collection. 

 I. Eight inches long. Lower Nile. Purr-hased of Dr. liiippell. 

 m-o. From fom-teen to eighteen inches long : skins. River Shire. 



Presented by Dr. Kirk. 

 p. Six inches long : skin. River Shire. Presented by Dr. Kirk. 

 q. Young. River Rovuma. Presented by Dr. Kirk. 



This species is mnch scarcer than the true L. niloticus, and belongs 

 rather to the fauna of the Upper Nile than to that of the Lower. 

 Riippell was the first to distinguish it, whilst Valenciennes evidently 

 confounded it with L. niloticus, from which it is distinguished by the 

 more backward position of the eyes, tlie thicker lips, deeper and 

 shorter body, convex and sometimes elevated dorsal fin, &c. The 

 figure and description published by Valenciennes are evidently taken 

 from L. roiibie, whilst that given by Geufiroy St. Hilaire represents 

 the tide L. niloticus. The latter name must, of course, be retained 

 for the common species, with which alone,, probably, Forstal was 

 acquainted. 



The series of examples before mc, from the Nile as well as from 

 the Zambezi, enables me to identify Peters's L. congoro with that 

 distinguished by Riippell ; and most probably als'^ his L. ultivelis 

 belongs to the same species. 



L. niloticus and L. coubie are, however, very closely allied to each 

 other; and there is a specimen in the Br'tish Museum vhich tinites 

 characters of both species, having thin lips, L. lat. 42, large eye, 

 convey dorsal fin with 15 rays, long body, and an elevated tail. It 

 is evidently identical with four examples described as a distinct 

 species, Laheo horie, by Heckel in Russegger's Reisen, ii. 3. p. 304, 

 taf. 21. fig. 1. I am inclined to regard this as a hi/brid between 

 L. niloticus and L. couhie. 



a. Eighteen inches long. Chartoum. From Mr. Petherick's Col- 

 lection. 



3. Lateo senegalensis. 



Labeo senegalensis, Cuv. 8f- Val. xvi. p. .346, pi. 486. 

 Kohitichthys senegalensis, Bleeh. Atl. IcJithyol. Cypr. p. 25 (nann 

 only). 



D. 14. A. 8. L. lat. 39. L. transv. 11. 



Snout thick, obtuse, without lateral lobe ; lips fringed. Eye rather 

 small, situated before the middle of the length of the head. Body 

 oblong. Upper margin of the dorsal fin not convex. ( Val.) 



West Africa. 



? a. Young. Cabo negro (Angola). Presented by Dr. Welwitsch. 



. Vni,. VTT. 



