378 CICHLIDJE. 



part of the branchial arches, and appearing as a strong prominence 

 in front of the latter when the gill-cover is lifted up *. 

 Africa. 



Synopsis of the Species. 



I. Lower lateral line at least nearly as long as upper ; caudal scaly, truncate 



or more or less distinctly emarginate ; pectoral usually at least as long as 



head ; scales cycloid or feebly denticulate. 



6-8 

 D. XV-XVI 13-15 ; A. Ill 8 ; Sc. 55-67 _A_ . 1. P. polylepis, Blgr., p. 382. 



D. XIII-XV 16-17; A. Ill 8-9; Sc. 40- 

 5-6_ 



45 3 2. P.jentinki, Stdr., p. 383. 



12-15 



D. XIV-XVI 12-14 ; A. III. 7-8 ; Sc. 31- 

 4-5 

 36 _2_ 3. P. lateralis, Blgr., p. 385. 



8-1 4 



II. Lower lateral line much shorter than upper, confined to caudal region of 

 body. 

 A. Scales cycloid ; caudal rounded, truncate, or slightly emarginate. 



1. 12 to 20 gill-rakers on lower part of anterior arch ; depth of body 2 to 

 2|- times in total length. 



D. XIII 11 ; A. Ill 8-9 ; Sc. 28-30 ^ 5 giU- 



rakers 18-20 ; teeth in 3 series ; pectoral as 



long as head 4. P. congicus, Blgr., p. 386. 



D. XV-XVII 9-12; A. Ill 7-8; Sc. 2S- 



30 g5fo > gill-rakers 12-15 ; teeth in 2 to 4 



series ; pectoral much shorter than head . . 5. P. guentheri, Sauv., p. 388. 

 D. XIV 11 ; A. Ill 7 ; Sc. 28 § ; gill-rakers 



14 ; teeth in 6 or 7 series; pectoral much 



shorter than head G. P. regani, Pellegr., p. 390. 



* Number of vertebras in skeletons examined : — 



13-)- 12 = 25. P. subocellatus. 



13+13=26. P. nir/rofasciatus, kinr/sleyce. 



13 + 17=30. P. cavifrons. 

 14+12=26. P. buettil-oferi. 



14 + 13 = 27. P. guentheri, kribensis, puleher. 



14 + 17 = 31. P.speUL 



15 + 15 = 30. P. lateralis. 



15 + 16 = 31. P. auritus. 



16 + 16 = 32. P.jentinli. 

 16 + IS = 34. P. macrops. 



