1899.] SYRIAN PISHES OF THE FAMILY CIOHLIDjE. 117 



deeper than long. Scales cj'cloid, 29-30 -j^^ ; lat. 1. j~. 



Brownish above, golden beneath ; a blackish opercular spot ; dorsal 

 and anal with blackish spots forming oblique streaks on the soft 

 part of the dorsal ; caudal with a wide-meshed dark network. 



Total length 160 millim. 



Lower Congo and Angola. 



14. TiLAPIA SQUAMIPINNIS. 



Chromis squamipinnis, Giinth. Proc. Zool. Soc. 1864, p. 311, and 

 1893, p. 621, pi. liii. 



Tilapia squamipinnis, Bouleng. Tr. Zool. Soc. xv. 1898, p. 4. 



Teeth small, in 4 or 5 closely-set series in both jaws. Depth of 

 body 2^ to 2|in total length, length of head 2| to 3 times. Snout 

 with straight or slightly convex upper profile, Ij to Ig diameter of 

 eye (as long as eye in the young), which is 4 times in length of 

 head (3 to 31 times in the young), and twice in interorbital 

 width (Ig to 1| in the young) ; mouth narrow, g to f width of 

 head ; maxillary extending to between nostril and eye ; 2 series of 

 scales on the cheek ; large scales on the opercle. Gill-rakers short, 

 17 to 19 on lower part o\ anterior arch. Dorsal XVI 10-11 ; 

 spines subequal from the middle ones, g to | length of bead, 

 about I longest soft rays. Pectoral pointed, as long as or a little 

 longer than the head, reaching origin of anal or a little beyond. 

 Ventral reachiug vent. Anal III 8-9 ; third spine nearly as long 

 as longest dorsals. Caudal slightly notched, upper angle pointed, 

 lower rounded and shorter. Caudal peduncle a little longer than 

 deep. Scales cycloid, 32-35 -^0^ ; lat. 1. j^^p. Pale greyish olive, 

 with 8 more or less regular blackish cross-bars ; oblique dark 

 streaks on the soft dorsal and a large dark spot between the 

 anterior rays. 



Total leugth 250 millim. 



Lake Nyassa and Upper Shire Elver. 



15. Tilapia macrocentea. 



Tilapia macrocentra, A. Dum. Arch. Mus. x. 1859, p. 256. 



Chromis macrocentra, E,ochebr. Actes Soc. Linn. Bord. (4) vi. 

 1883, p. 133. 



Depth of body 21 in total length. 3 series of scales on the 

 cheek. 22 gill-rakers on lower part of anterior arch. Dorsal XIV 

 13, the spines remarkably strong and triangular. Anal III 10, 

 Caudal rounded. Scales very large, cycloid, 26 in the lateral series. 

 Uniform brown. 



Total length 260 millim. 



Senegal. 



I am indebted to the kindness of Prof. Vaillant for some notes 

 on the gill-rakers, scales, and shape of the caudal in this and the 

 other species so imperfectly described by Aug. Dumeril. 



