504 CICHLID-E. 



convex, as long as eye in adult, shorter in young; eye 3 to 3^ times in 

 length of head, 1 to 1^ times in interorbital width ; jaws strong, lips 

 thick; mouth extending to below anterior fourth of eye ; 14 to 20 teeth 

 in upper jaw, 12 to 16 in lower; interocular region scaly, convex; 3 or 

 4 series of scales on the cheek. 18 to 21 gill-rakers on lower part of 

 anterior arch, the posterior rather elongate. Dorsal XVIII-XX 11-13 ; 

 spines rather strong, subequal from the eighth or ninth, f to -^ 

 length of head ; longest soft rays i to f length of head. Anal 

 III 12-13 ; spines very strong, third f to ^ length of head. 

 Pectoral f to f length of head. Ventral not reaching anal. 

 Caudal with deep crescentic notch. Caudal peduncle If to 2 times as 



long as deep. Scales 75-78 j^^ ; lateral lines 4^53; 5 series of scales 

 between the lateral lines anteriorly. Olive-grey above^ shading to 

 whitish below, with 7 or 8 somewhat irregular, yellowish-brown, longi- 

 tudinal lines ; two or three ill-defined dark brown bars across the back 

 and a round blackish spot at the root of the caudal fin sometimes 

 present ; a black opercular spot ; dorsal and caudal fins brown, with 

 round yellow spots. 



Total length 290 millim. 



Lake Tanganyika. — Types in Congo Museum, Tervueren. 



i-2. Ad. Niamkolo. Dr. W. A. Cunniiigtoii ((!.). 



;5. Hot. Jloliro. ,, 



4. Hgr. Ivasakalawe. „ 



5. Skel. .Siiin})a. 



<>• Yg. Albertville. fJaph Hecq (C). 



7- Hgr. Kilewa Bay. Dr. L. Stappers (C). 



41. PAEETROPLUS. 



Block. Vorsl. Ak. Amsterd. ii. 1868, p. .311 ; Sauv. Hist. Madag., Poiss. p. 445 

 (1891) ; B.juleng. Proc. Zool. Sue. 1899, p. 142; Pellegr. M<^m. Soc. Zool. 

 Fraiioc. xvi. 19(11, p. 358. 



Body short; scales cycloid; two incomplete lateral lines. Teeth 

 rather large, with blunt crowns, forming a single series ; one or two 

 more or less enlarged teeth on each side at the symphysis of either jaw ; 

 maxillary exposed. Dorsal with 16 to 20 spines, anal with 8 to 10, both 

 fins with a scaly basal sheath. A scaly process at base of ventral. 

 Occipital and parietal crests strong, extending to between the orbits. 

 Yertebrse 34 (17 + 17). 



^tadagascar. 



