Download Trewavas (1935) - The Cichlid Fishes of Lake Malawi ...

118 On the Cichlid Fishes of Lake Nyasa.widely interrupted ; maxillary extending to below eye ;teeth small, conical, in 3 or 4 series anteriorly. 5 to 7 seriesof scales on cheek. 10 to 12 gill-rakers on lower part ofanterior arch. Pharyngeal teeth small. 34 to 36 scalesin a longitudinal series, 5 or 6 from origin of dorsal to lateralline. Dorsal XV-XVII 11-13 ; last spine from less than4 to + length of head. Anal I11 9-11 ; third spine strongerand as long as or shorter than last dorsal. . Pectoral # to Qlength of head. Caudal densely scaled, truncate or somewhatemarginate. Caudal peduncle 15 to 18 as long as deep. Headusually with irregular spots, body sometimes with cross-bars ;a blackish band or series of spots at base of dorsal, extendingon to upper edge of caudal peduncle ; an oblique blackishband, mainly below upper lateral, and from nape to middleof base of caudal ; 'soft dorsal usually spotted.Nineteen specimens, 130 to 250 mm. in total length.23. SERRANOOHROMIS Regan, 1920.One species in Lake Nyasa.Serralzoclironzis tliumbergi (Castelnau), 1861.Serrodmie thumb& Regan, t. o. p. 264.Katanga and Angola to Lake Nyasa.Numerous specimens; up to about 380 mm. in total length,from both ends of the lake.