The Fn'xJnrtili^r F/.-7/rx of Soutli A I'rirn. 475 



Dorsal 8, originating twice as far from eye as from root of caudal, 

 above posterior third of anal; last rays longest, \- length of head. 

 Pectoral T 7 <y length of head, reaching base of ventral ; the latter 

 moderately large, reaching anal, and much nearer to end of snout 

 than to root of caudal. Anal 14. Caudal rounded, about as long as 

 or slightly longer than length of head ; caudal peduncle about 1 * 

 times as long as deep. 28-30 scales in longitudinal series, 18 round 

 body in front of ventrals ; no lateral- line pits. 



Colour (of preserved specimens), light brown above, pale yellowish 

 beneath, finely speckled with darker, especially on the borders of the 

 scales ; a fine blackish line runs along the sides of the body from 1h<> 

 opercular border to the base of caudal ; tins greyish. 



FIG. 118. Haploch (7)i,s joluixhniii. Type. 



Two specimens, 29 mm., 33 mm. in length respectively, from 

 Sakauia, South Congo (Rev. T. A. Rogers). Bulawayo Museum 



The species is also reported from Nyassaland, Lake Rukwa, and 

 Zululand . 



SUB-ORDER ACANTHOPTERYGII. 

 DIVISION PERCIFORMES. 



FAMILY CICHLIDAE. " 



The African Cichlidae are computed by Dr. Boulenger (' Catalogue 

 of the Freshwater Fishes of Africa,' vol. iii, 1915) to number 285 

 well-established species, grouped under 41 genera ; he remarks, how- 

 ever (p. 134), that " the classification of the very numerous African 

 members of this family presents the greatest difficulties . . . the 

 dentition in certain species being subject to variation, according to 

 age, or even of a purely individual nature." Lake Tanganyika has 

 furnished about one-third of these species, and is remarkable for the 

 very numerous generic types with very aberrant dentition which 

 appear to have been evolved out of the more generalised forms 

 occurring in the rivers of Africa. 



Some members of this large family, e. g. Tilapia, Tropheus, and 



