11. LAHEO. 51 



a little less than one-fourth of the total (without caudal) ; the width 

 of the intcrorbital space (which is rather flat) is one-half of the 

 length of the head. Gill-cover very short. There are three longi- 

 tudinal series of scales between the lateral line (which is indistinct) 

 and the root of the ventral fin. The free portion of the scales is 

 short and high. Dorsal fin elevated, with the upper margin convex ; 

 anal extending to the base of the caudal, which is forked, and has 

 the lobes more or less produced. Pectoral fin reaching the base of 

 the ventral. Body, and especially the tail, compressed and elevated ; 

 the height of the body is one-third of the total length (without 

 caudal) ; free portion of the tail deeper than long, its greatest depth 

 being three-fourths of the length of the head. Coloration uniform 

 brownish, fins black. 



Snout more or less covered with hollow tubercles. 



West Africa. 



a-c. Adult (12 inches long) and young. Lagos. Purchased of 

 Mr. H. T. Ussher. 



6. Labeo mesops. 



D. 13. A. 7. L. lat. 30. L. transv. 6|/7. 



Mouth apparently small, with moderately thick lips. Snout (with- 

 out tubercles) moderately produced, the eye occupying the middle of 

 the length of the head. Eye about as large as a scale, the diameter 

 of the honij orhit being two-thirds of the length of the postorbital 

 part of the head. The length of the head is two-ninths of the total 

 (without caudal), the height of the body one-fomlh. Intcrorbital 

 space very broad and convex. Gill-cover of moderate length. There 

 are four and a half longitudinal series of scales between the lateral 

 line and the ventral fin. Pins rather feeble ; upper margin of the 

 dorsal concave ; anal not extending to the caudal, the free portion 

 of the tail being a little longer than deep. Pectoral fin terminating 

 at a great distance from the ventral. Coloration uniform. 



East Africa. 



a. Skin, 13 inches long. Pamolorabe Lake near Nyassa. Presented 

 by Dr. Kirk. 



2. Indian species. 

 a. 3Iore than thirteen dorsal ra;/s. 



7. Labeo nandina. 



Cyprinus nandina, ira)n. Buck. I'ish. Gang. p. 300, pi. 8. fig. 84 ; 



'M'Clcll. Lid. Ci/pr. p. 319. 

 Rohita nandina, t'uv. 4' Val. xvi. p. 244, pi. 473. 



D. 26. A. 7. L. lat. 43-44. 

 Structure of snout and mouth as in the following species. Four 

 small barbels, the upper being much smaller than the lower, which is 

 about as long as the eye. Dorsal fin rather low. The height of the 

 body is one-third or a little more than one-third of the total length 

 (without caudal). Coloration uniform. 

 Northern Bengal. Trawaddy. 



T 2 



