S28 CICHLIDiE. 



anterior arch. Darsal XVI 10 ; spines subequal in length, \ length 

 of head ; longest soft rays not quite \ length of head. Anal III 7. 

 Pectoral § length of head. Ventral reaching origin of anal. Caudal 

 rounded. Caudal peduncle a little deeper than long. Scales den- 

 ticulate, 30 j|; lateral lines jf. Dark olive-brown above, whitish 

 beneath ; soft dorsal and caudal fins barred with blackish ; a few 

 ocellar dark spots on the anal fin. 



Total length 150 millim. 



Lusombo, Kasai River, Congo. — Type in Congo Museum, Tervueren. 



13. PARATILAPIA THUMBERGII. 

 Chromys thumberc/i, Castelu. Mem. Poiss. Atr. Austr. p. 13 (1861). 

 Chromys ngamensis, Casteln. 1. c. 

 ? Chromys livingstonii, (Jasteln. 1. c. 



Hemicliromis robustus, Giinth. Proc. Zool. Soc. 1864, p. 312. 

 Hemicliromis jallce, Bouleng. Boll. Mus. Torin. xi. 1896, no. 260. 

 Paratilapia robusta, Bouleng. Proc. Zool. Soc. 1898, p. 141, and Poiss. Bass. 



Congo, p. 414 (1901) ; Pellegr. Mem. Soc. Zool. France, xvi. 1904, p. 266. 

 Paratilapia thumbergii, Bouleng. Proc. Zool. Soc. 1898, p. 146 ; Pellegr. t. c. 



p. 268; Bouleng. Tr. Zool. Soc. xviii. 1911, p. 412, pi. xli. 



Depth of body 2|- to 3^ times in total length, length of head 2f to 3 

 times. Head 2 to 2^ times as long as broad, upper profile straight 

 or slightly convex or slightly concave; lower jaw projecting; snout 

 obtusely pointed, as long as broad, shorter than postocular part of head; 

 eye 4J (young) to 6 times in length of head, nearly equal to or a little 

 less than interorbital width or prseorbital depth ; mouth extending to 

 below anterior border of eye or a little beyond ; teeth moderate, in 

 2 to 4 series, 48 (young) to 80 in outer series of upper jaw ; 7 to 9 

 series of scales on the cheek, width of scaly part 1§ to 2 diameters of 

 eye. Gill-rakers moderately long, some of the posterior usually bifid 

 or trifid, 10 to 12 on lower part of anterior arch. Dorsal XV-XVIII 

 13-16 ; spines increasing in length to the last, which is % to f length 

 of head ; longest soft rays J to f length of head. Anal III 10-12 ; 

 third spine ^ to f length of head. Pectoral f to § length of head, not 

 extending to vertical of origin of anal. Ventral usually not reaching 

 vent or anal. Caudal rounded or rounded-subtruncate. Caudal 

 peduncle as long as deep or a little longer than deep. Scales feebly 

 denticulate, sometimes cycloid, 35-41 rjzxf; lateral lines jp^g. Dark 



