1893.] 



FISHES FEOM LAKE TANGANYIKA. 



631 



of the scaly portion of the cheek, but is less than the width of the 

 interorbital space, which is nearly flat. The two limbs of the 

 prieoperculum meet at a right angle ; the height of the body is 

 contained twice and a fourth in the total (without caudal), the 

 length of the head twice and four fifths ; the longest dorsal spine 



Fig. 2. 



7/ 



Ckromig tanijanicce. 



is less than one half of the length of the head. Caudal scaleless. 

 Pectoral fin extending beyond the origin of the anal. Scales 

 with concentric rough undulating ridges. Coloration uniform 

 greenish with silvery reflections. 

 Three specimens. 



Cheomis burtoni, sp. n. (Plate LVIII. fig. C.) 



D. 



A. t L. lat. 27. 



L. transv. -f. 



Teetli small, each with a small outer cusp, twenty-eight on 

 each side of the outer series of the upper jaw. Scales below the 

 eye in four or five series. In a specimen nearly -i inches long the 

 diameter of the eye equals the width of the prceorbital and of the 

 interorbital space, which is slightly convex transversely, but has a 

 concave longitudinal profile ; the deptli of the scaly portion of the 

 cheek is distinctly more than tlie width of the orbit. The angle 

 formed by the prjeopcrcular limbs is a riglit one. The height 

 of the body is rather more than the length of the head, which is 

 one third of the total (without caudal). The length of the last 

 dorsal spine is two fifths of that of the head ; caudal with convex 



Proc. Zool. Soc— 1893, No. XLIII. 43 



