. Bulletin of the British Museum (Natural History). LAKE GEORGE HAPLOCHROMIS SPECIES 217 Mouth horizontal, lips slightly thickened ; lower jaw shorter than the upper when the mouth is closed. Length of upper jaw 30-8-36-0 (M = 32-8) per cent of head, length of lower jaw 29-2-35-I (M = 33-1) per cent, i-o-i-4 (mode i-i) times longer than broad. Posterior tip of the maxilla reaching a vertical through the anterior margin of the eye, rarely not quite reaching that Fig. 35. Haplochromis eduardianus. Lake George specimen ; a male. Gill rakers. The lowermost i or 2 rakers are reduced, the ot
. Bulletin of the British Museum (Natural History). LAKE GEORGE HAPLOCHROMIS SPECIES 217 Mouth horizontal, lips slightly thickened ; lower jaw shorter than the upper when the mouth is closed. Length of upper jaw 30-8-36-0 (M = 32-8) per cent of head, length of lower jaw 29-2-35-I (M = 33-1) per cent, i-o-i-4 (mode i-i) times longer than broad. Posterior tip of the maxilla reaching a vertical through the anterior margin of the eye, rarely not quite reaching that Fig. 35. Haplochromis eduardianus. Lake George specimen ; a male. Gill rakers. The lowermost i or 2 rakers are reduced, the others are relatively slender although as many as 3 of the lower rakers may be relatively stout. The pseudorakers are well developed and prominent, but are short and stout. There are 8 or 9 (rarely 10) gill rakers in the outer series on the lower part of the first gill arch. Scales. Ctenoid ; lateral line with 31 (), 32 () or 33 () scales, cheek with 2 or 3 (mode), rarely 4 rows. Five to 7 (modes at 5 and 5-^) scales between the upper lateral hne and the dorsal fin origin, 6-8 (mode 7) between the pectoral and pelvic fin bases. Fins. Dorsal with 14 (), 15 () or 16 () spinous and 8 (), 9 () or 10 () branched rays. Anal with 3 spines and 7 (), 8 () or 9 () branched rays. Pectoral fin 26-5-32-4 (M = 28-1) per cent of standard length, 8o-5-98-o (M = 82-0) per cent of head. Caudal subtruncate, scaled on its basal half. Pelvics with the first ray slightly elongate. Teeth. With one exception in the material studied, the shape of the outer teeth in both jaws is remarkably uniform. Each tooth is unicuspid, with a flattened crown that is almost half the total length of the tooth. The whole crown is strongly in- curved (especially in teeth situated anteriorly and anterolaterally), and its tip is broadly rounded (text-figs. 36 & 37). The neck of the tooth is cylindrical and, compared with that of a typical bicuspid tooth, much stouter. If a tooth w
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