TILAPIA. 23^ 



69. TILAPIA PECTORALIS. 



Ctenochromis pectoralis, Pfeff. Jalirb. Hamb. Wiss. Anst. x. 1893, p. 153, pi. ii. 



figs. 3, 4, 7, and Thierw. O.-Afr., Fische, p. 16, fig. (1896). 

 Tilapia pectoralis, Bouleng. Proc. Zool. Soc. 1899, p. 130; Pellegr. Mem. Soc. 



Zool. France, xvi. 1904, p. 338. 



Depth of body nearly equal to length of head, 2f times in total length. 

 Head twice as long as broad; snout rounded, with straight upper 

 profile, as long as broad, shorter than postocular part of head, as long as 

 the eye, which is somewhat more than 3 times in length of head, slightly 

 exceeds interorbital width, and equals twice praeorbitaJ depth ; mouth 

 rather large, extending nearly to below anterior border of eye, end of 



Tilapia pectoralis. 

 Type, after Pfeffer (Jahrb. Hamb. Anst. 1893). 



maxillary exposed ; teeth in 5 series, outer rather large, inner very 

 minute ; 3 series of scales on the cheek, width of scaly part much less 

 than diameter of eye. Gill-rakers very short, 10 on lower part of 

 anterior arch.. Dorsal XV-XVI 8-9 ; spines subequal from the fifth or 

 sixth, about f length of head; soft rays longer. Anal III S; third 

 spine as long as longest dorsals. Pectoral nearly as long as head, 

 extending as far as origin of anal. Ventral reaching origin of anal. 

 Caudal truncate. Caudal peduncle as long as deep. Scales strongly 

 denticulate, 30 j^; lateral lines ^j^. Brownish, with 10 to 12 dark 

 bars ; a dark opercular spot ; dark streaks and a large white, dark-edged 

 ocellus on the soft dorsal and on the anal. 



Total length G3 millim. 



Korogwe, German East Africa. — Types in Hamburg Museum. 



1. One of the types. Korogwe. Dr. Stulilmann (C.) ; 



Hamburg Museum (E.). 



