JAN., 1918. FISHES FROM THE ATHI RIVER HUBBS. 13 



In the type there are 35 radially striate scales along the lateral line; 

 from the lateral line series there are 7^ rows to the middorsal line, 6^ 

 rows to the midventral line and 4 rows to the insertion of the pelvic fin; 



there are 16 series around the caudal peduncle. The variation in the 



6> 7# 

 paratypes is expressed in the formula: 34 to 36, ^-^ 3 (rarely) to 



4, 14 (rarely) to 16. 



The dorsal fin is slightly falcate; its origin is equidistant from the 

 end of the snout (or from the front of orbit), and from the end of the 

 lateral line; the dorsal fin has 7 branched rays; the last of the simple 

 rays is strong and serrated; its bony length is constantly a little shorter 

 than the postrostral length of the head. Anal with 5 branched rays, the 

 longest of which is a little lower than the dorsal spine, and fails by much 

 to reach the caudal fin. The pectoral fin falls short of the pelvic insertion, 

 its length being contained 1.7 (1.45 to 1.65) times in the head. The 

 pelvic extends from a little before the vertical from the dorsal origin 

 almost or quite to the anus. 



The color in alcohol is brownish above, darkest towards the base of 

 the scales; grading to silvery below the middle of the sides on the head 

 and body. The axial septum of the lateral muscles is marked by an 

 intense black streak, which gracefully curves upward above the lateral 

 line anteriorly, and becomes faint towards the head; posteriorly a dark 

 area diffuses outward from the black streak, forming thus a lateral band; 

 the lateral line is more or less blackish; a black spot is always present at 

 the caudal base. The dorsal, caudal, and pectoral fins are light dusky, 

 while the anal and pelvic fins are clear. In the young the black streak 

 is a little wider, but there are no important individual nor age variations 

 in the coloration. 



(helleri, named for the naturalist Edmund Heller, who accompanied 

 the East African Expedition.) 



Barbus akeleyi sp. nov. 



Plate III 



Type specimen, a female with mature eggs, 74 mm. long to caudal 

 base, Cat. No. 6106, Field Museum of Natural History. The description 

 of the type is supplemented by measurements of 12 paratypes (Cat. 

 No. 6m), varying in length from 58 to 71 mm.; 48 other specimens 

 (Cat. No. 6112), from 27 to 59 mm. long, were secured. 



Barbus akeleyi is a member of a rather large group of closely related 

 species inhabiting the southeastern waters of Africa. A brief comparison 

 has been prepared to indicate the major characters in which B. akeleyi 

 differs from the descriptions of its closest allies. It differs from serrifer 



