90 DR. A. GlJNTHER ON REPTILES AND [Jan. 16, 



7. SxifODONTis zAMBEZENSis, Ptrs. Ngataiia. 



8. Alestes aefinis, sp. n. 

 Allied to Alestes iniberi. 



D. 11. A. 18-19. L. lat. 21. L. transv. |. 



The height of the body is one third of the total length (A\ithout 

 caudal) ; the length of the head two sevenths. The origin of the 

 doi'sal fin is distinctly behind the base of the ventrals ; pectoral 

 reaching the ventral. Silvery, with an indistuact shining band along 

 the side ; a blackish spot behind the shoulder and another at the 

 root of the caudal. 



Three specimens, 'ih inches long, were obtained at Merifano on 

 the Tana Eiver. 



9. Labeo geegorii, sp. u. (Plate X. fig. B.) 



D. 14. A. 7. L. lat. 37. L. transv. |. 



Mouth broad, crescent-shaped ; lo\^'er lip thick and friaged 

 with an inner fold A^'hich is covei-ed with horny substance. Snout 

 thick, produced, obtuse in front, much projecting beyond the lower 

 jaw, without lateral lobe ; maxillary barbel small, hidden in a deep 

 lateral groove. Eye rather large, two sevenths of the length of 

 the head, rather shorter than the snout, and somewhat nearer to 

 the end of the snout than to the gill-openiag. The length of the 

 head is contained thrice and two thirds in the total length (\\ithout 

 caudal), the depth of the body thrice and a half. Interorbital 

 space broad, scarcely convex, its width being one half of the length 

 of the head. There are four longitudinal series of scales between 

 the lateral line and the root of the ventral fin. Upper margin of 

 the dorsal fin oblique ; anal extenchng to the caudal, the pectoral 

 to the ventral. Greenish above, sdvery on the sides and below. 



One specimen, 5 inches long, was obtained at IMerifano on the 

 Tana Eiver. 



10. Babbtjs tanensis, sp. n. (Plate XI.) 



D. 12. A. 7 or 8. L. lat. 25. L. transv. % 



The osseous dorsal ray is strong, not serrated, its stiff portion 

 being rather shorter than the head. There are one and a half 

 longitudinal series of scales between the lateral line and the root 

 of the ventral fin. Body compressed, its greatest depth contained 

 twice and three fourths in the total length (without caudal). 

 Head rather small, one fifth of the total length, measured to the 

 end of the middle caudal rays. Snout of moderate length, with 

 the upper jaw overlapping the lower, and with four barbels, of 

 which the posterior reaches to the angle of the prseopereulutn. 

 The diameter of the eye is two ninths of the length of the head 

 and two thirds of that of the snout. Origin of the dorsal fin 

 opposite to the root of the ventral and nearly midway between the 

 end of the snout and the root of the caudal. Caudal fin deeply 



