CICHLID FISHES OF LAKE VICTORIA. J 63 



1. Haplochromis nigricans Bouleng., 1906. 



Tilapia nigricans (part.) Bouleng. Cat. Afr. Fish. iii. p. 240, 

 %. 160. 



Tilcqna simoies Bouleng. t. c. p. 242, fig. 161. 



Depth of body 2| to 3 in length, length of head 3 to 3^. 

 Snout decurved, about as long as diameter of eye, which is 3| to 

 3| in length of head, greater tlian prteorbital depth, equal 

 to mterorbital width. Jaws equal or lower jaw a little the 

 shorter, short and broid, about ^ length of head ; maxillary 

 reaching A^ertical from anterior edge of eye or a little beyond ; 

 teeth slender, cuspidate, in 6 to 8 series, outer but little enlarged 

 and not separated by a distinct interspace from inner ; 40 to 70 

 in outer series of upper jaw. 3 or 4 series of scales on cheek. 



7 to 10 gill-rakers on lower part of anterior arch. Pharyngeal 

 teeth small. 31 to 33 scales in a longitudinal series, 5 or 7 from 

 origin of dorsal to lateral line. Dorsal XY-XVI 9-10 ; last 

 spine i length of head. Anal III 8-9 ; third spine nearly as 

 long as last dorsal. Pectoral a little shorter than head, not 

 reaching anal. Caudal truncate or subtrancate. Caudal peduncle 

 as long as or a little longer than deep. Brownish or greyish, 

 with traces of blackish cross-bars ; males with 2 to 4 ocelli on 

 anal. 



Nine specimens, including types of T. nigricans and T. simotes, 

 70 to 145 mm. in total length, and a skeleton. 



Boulenger's figures show T. nigricans as having quite a 

 difterent physiognomy from 2\ simotes, but this is because the 

 head is directed upwards in the former. 



2. Haplochromis nuohisquamulatus Hilgendoi-f, 1888, 



Ghromis ^luchisquamulatus Hilgend. Sitzb. Ges. naturf. Fr, 

 Berlin, 1888, p. 76. , 



Ctenochromis nuchisqiiamulatus Pfefier, Thierw. O.-Afr. Fische, 

 p. 14 (1896). 



Tilapia nigricans (part.) Bouleng. Cat. Afr. Fish. iii. p. 240. 



Haplochromis nuchisquamidatus (part.) Bouleng. t. c. p. 290. 



Depth of body 2| in length, length of head 3 to 3-^. Snout 

 with straight profile, about as long as diameter of eye, which is 

 3^ to 3| in length of head, greater than prteorbital depth, equal 

 to or greater than depth of cheek ; intei-orbital width 34- to 3., in 

 length of head. Jaws equal or lower slightly projecting ; rami 

 of lower jaw longer and more slender than in H. nigricans, 

 about i length of head. Teeth as in the preceding species, in 5 to 



8 series, 50 to 80 in outer series of upper jaw. 2 or 3 series of 

 scales on cheek. 9 to 11 gill-rakers on lower part of anterior 

 arch. Pharyngeal teeth small, 31 to 33 scales in a longitudinal 

 series, 5 or 6 from origin of dorsal to lateral line. Dorsal XY- 

 X.YI 9-10 ; last spine h length of head. Anal III 9-10 ; third 

 spiue I" to k head. Pectoral as long as or a little shorter than 



11* 



