300 CICHLID.E. 



41. PAUATILAPIA DIMIDIATA. 

 Chromis lateristriga, part., Giinth. Proc. Zool. Soc. 1864, p. 312. 

 ITemichromis dimidiatus, Giinth. t. c. p. 313. 



Paratilapia dimUiiata, Boulontr. Proc. Zool. Soc. 1898, p. 145 ; Pellegr. Mem. 

 Soc. Zool. France, xvi, 1904, p. 2(34. 



Depth of body 3 to 3J times in total length, length of head 2f to 

 3 times. Head 2\ to 2^ times as long as broad, with straight or 

 slightly curved upper profile; lower jaw projecting; snout rounded, as 

 long as broad or a little longer than broad, as long as postocular part 

 of head; eye 4^ to 5| times in length of head, 1\ to I5 times in inter- 

 orbital width, equal to or a little less than praeorbital depth ; mouth 

 not extending to below anterior border of eye ; teeth in 3 to 5 series, 

 outer moderate or rather large, 40 to 60 in upper jaw ; 4 or 5 series of 

 scales on the cheek, width of scaly part equal to or greater than 



Fijr. 214. 



Paratilapia dimidiata . 

 L. Nyassa. f . 



diameter of eye. Gill-rakers short, 10 or 11 on lower part of anterior 

 arch. Dorsal XVI-XVIII 10-12; spines increasing in length to the 

 last, which measures -J length of head ; longest soft rays | to f length 

 of head. Anal III 10-11 ; third spine as long as middle dorsals. 

 Pectoral § to | length of head, not extending to vertical or origin of 

 anal. Ventral not reaching beyond vent. Caudal densely scaled, 

 feebly but distinctly emarginate. Caudal peduncle IJ to If times as 

 long as deep. Scales cycloid or very indistinctly denticulate, 34-36 joiii ; 

 lateral lines fs^- Olive-brown above, silvery white beneath ; a blackish 



