the Family Cicliliclse. 'I'^'J 



Ti. ATwcru. 



In tlic eiglit examples in the liritisli Miiseuni (Natural 

 History), including the figured type, I count 10 to 12 gill- 

 rakers on the lower part of the anterior arch, lioulenger 

 gives the number as 7 to 10, and it seems probable that his 

 original material included examples of //. stiymatoyenys. 



16. Haplochromis polyacanthus, Bouleng., 1899. 



Tilapni stonnaii, I»oiileng. Cat. Afr. Fish. iii. p. 227, fifr. 14'J. 

 Tilupia poll/acanthus, Bouleng. t. c. p. 247, tig. 1G5. 



Total length 1 15 mra. 



Upper Congo and L. Mweru. 



In this well-marked species the nuchal and pectoral scales 

 are very small, the lower part of the cheek is naked, and the 

 teeth are in several series. Of the six examples I have 

 examined three have 17 dorsal spines, two 18, and one 19. 



17. Haplochromis fuellehornii , Hilgend. & Pappenh., 1903. 



Tilapia fuellehorm, Bouleng. Cat. Afr. Fish. iii. p. 222. 



Apparently distinguished from other East African species 

 by having the caudal peduncle much longer than deep. 

 Total length 4-3 mm. 

 Lake Rukwa. 



18. Haplochromis pectoralis, Pfeff., 1893. 

 TUapia pectoralisy Bouleng. Cat. Afr. Fish. iii. p. 237, fig. 150. 



Depth of body nearly 3 in length, length of head 2f. 

 Snout as long as diameter of eye, which is 3 in length of 

 head, twice depth of prreorbital, greater than depth of cheek ; 

 interorbital width 4^ in lieaRl. Jaws equal anteriorly ; 

 maxillary extending to vertical from anterior edge of eye ; 

 teeth cuspidate, in 4 series in upper jaw, 3 in lower, 40 in 

 outer series of upper jaw. 3 series of scales on upper part 

 of cheek, which is naked below. 8 or 9 gill-rakers on lower 

 part of anterior arch. Pharyngeal teeth small. 30 scales 

 in a longitudinal series, G from origin of dor5>al to lateral 

 line, 6 between pectoral and pelvic fins. Dorsal (XV) XVI 

 8 (9) ; last spine nearly 5 length of head. Anal III 8. 

 Pectoral || length of head, reaching vent. Caudal subtrun- 

 cate. Caudal peduncle as long a.s deep. About ten wavy 

 dark cross-bars. 



Tanganyika Territory. 



One of the types, 03 ram. long. 



