378 CICHLID^. 



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 Literal 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 cj'cloid or feebly denticulate. 



6-8 

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



16-19 

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

 5-6 

 45 ^JZ ■ ■ 2. P.>/(<;nZ,/, Stdr., p. 383. 



12-1.5 



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

 4-5 



36 J^ 3. P. lateralis, Blgr., p. 385. 



8-14 



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 '^■, gill- 

 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. 28- 

 ^^9-10' gill-™lvers 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 ~l ; gill-rakers 

 14 ; teeth in 6 or 7 series; pectoral much 

 shorter than head C. P. rpiyani, Pellegr., p. 390. 



* Niuiiber of vertebras in skeletons examined : — 



13 + 12=25. P. subocellatus. 



13+13=26. P. nigrofasciatus, kingsleycE. 



13 + 17:=30. P. cavifrom. 

 14+12=26. P. buettiJcofevi. 



14+13 = 27. P. r/ueiitJteri, h-ibensis, pulchcr. 



14 + 17 = 31. P.speJcii. 



15 + 15 = 30. P. lateralis. 



15 + 16=31. P.auritus. 



16 + 16 = 32. P.jeiithili. 

 16 + 18 = 34. P. viacrops. 



