. Bulletin of the British Museum (Natural History). PELMATOCHROMIS, TILAPIA AND SAROTHERODON 3 in the lower, unevenly broadening to an extra row in both jaws in large specimens, and the inner are much smaller than the outer. Premaxillary pedicels 21 â 6-26-8% length of head (277 in one), interorbital width 33-5-38-0. Gill-rakers on first arch (4-8) + I + (8-14), the upper very slender (fig. 3). Pad on roof of pharynx moderate, a shallow groove in front of it. Lower pharyngeal bone slender, with all the teeth very slender, up to twice as many in a middle row as in a comparable specimen of P. oc
. Bulletin of the British Museum (Natural History). PELMATOCHROMIS, TILAPIA AND SAROTHERODON 3 in the lower, unevenly broadening to an extra row in both jaws in large specimens, and the inner are much smaller than the outer. Premaxillary pedicels 21 â 6-26-8% length of head (277 in one), interorbital width 33-5-38-0. Gill-rakers on first arch (4-8) + I + (8-14), the upper very slender (fig. 3). Pad on roof of pharynx moderate, a shallow groove in front of it. Lower pharyngeal bone slender, with all the teeth very slender, up to twice as many in a middle row as in a comparable specimen of P. ocellifer (fig. 5). In a young fish of SL 61 mm there is a total of about 135 teeth on the bone as compared with 120 in a 64-5 mm P. ocellifer and no in the 100 mm specimen of that species. Scales of cheek in 3 rows, between origin of dorsal and lateral line 35-4. Anal III 9-10. Vertebrae 26 () or 27 (); in the last, one vertebra has an abnormally short centrum. A scaly sheath at base of anal fin. Rows of small scales along the caudal rays for J to J of their length. Colour in alcohol: Six dark vertical bands of varjang intensity on the body, the first immediately behind operculum, the last at the ene of caudal peduncle, these bearing up to six large, round blotches in series from behind opercular spot to end of caudal peduncle; of ten a faint or incomplete upper band or series of blotches. In a few specimens upper end of transverse band immediately below the tilapia- mark intensified, suggesting a "pelmatochromis-mark" iike that characteristic of P. buettikoferi. Tilapia-mark becoming smaller in adult and finally vanishing or obscured by general dark colour of fin. Some individuals with alternate dark and clear spots on caudal and soft dorsal and a white upper edge to dorsal Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not pe
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