. Bulletin of the British Museum (Natural History). LAKE GEORGE HAPLOCHIiOMIS SPECIES i8i Coloration in life. Adult males : the dorsum of the head and body is an iridescent violet which shades to turquoise on the midflank and greenish-golden on the belly. Chest and lower jaw are sooty, the branchiostegal membrane dusky to black, and the cheeks greenish-turquoise. Cephalic markings are not always visible, but when developed consist of a prominent, saddle-shaped nuchal bar and two parallel stripes across the Fig. 19. H. angiistifrons. Lower pharyngeal bone, in occlusal view. Scale = i-om
. Bulletin of the British Museum (Natural History). LAKE GEORGE HAPLOCHIiOMIS SPECIES i8i Coloration in life. Adult males : the dorsum of the head and body is an iridescent violet which shades to turquoise on the midflank and greenish-golden on the belly. Chest and lower jaw are sooty, the branchiostegal membrane dusky to black, and the cheeks greenish-turquoise. Cephalic markings are not always visible, but when developed consist of a prominent, saddle-shaped nuchal bar and two parallel stripes across the Fig. 19. H. angiistifrons. Lower pharyngeal bone, in occlusal view. Scale = i-omm. The dorsal fin is dark hyaline with a sinuous black band running the entire length of the fin at a level about one-third of the distance between margin and base. Caudal fin dark hyaline, as is the anal which, however, is black basally and along its margin, and may show a faint pink flush ; the anal ocelli are orange. The pelvic fins are black. Shortly after death, traces of 7-10 vertical bars may appear on the flanks and caudal peduncle. Adult females are metallic grey dorsally, shading through silver on the flanks to whitish on the belly. All fins are hyaline or faint yellow ; the caudal is densely and clearly maculate, the spots dark grey and very obvious. (Indeed, this feature is diagnostic for the species in Lake George.) Preserved coloration. Males : the ground colour is dark brown to black, the dark pigment most concentrated on the snout, cheeks, operculum, belly and lower half of the flanks. The lips are usually lighter than the cheeks, and the thoracic region is lighter than the flanks and belly. Traces of up to 6 narrow, fairiy close-set vertical bars are often visible on the flanks. The bars are most distinct dorsally because ventrally they merge with the overall dark coloration for that region. Cephalic markings are not always visible, but when present consist of 2 bars across. Please note that these images are extracted from scanned page images that may have been
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