. Bulletin of the British Museum (Natural History), Geology. OSTRACODS OF EAST AFRICA b 207. Fig. iga-c. Cytheropteron (? Infmcytheropteron) aitkeni sp. nov. a. Internal view, male right valve dorsal margin and duplicative, paratype b. Dorsal view, female carapace, paratype c. Anterior and posterior duplicatures to show marginal pore canals, female right valve, paratype right dorsally (PL 12, fig. 8) but ventrally there is no overlap (Text-fig. 19b). Shell surface pitted with furrow parallel to dorsal margin. Eye swelling usually poorly developed but may be prominent
. Bulletin of the British Museum (Natural History), Geology. OSTRACODS OF EAST AFRICA b 207. Fig. iga-c. Cytheropteron (? Infmcytheropteron) aitkeni sp. nov. a. Internal view, male right valve dorsal margin and duplicative, paratype b. Dorsal view, female carapace, paratype c. Anterior and posterior duplicatures to show marginal pore canals, female right valve, paratype right dorsally (PL 12, fig. 8) but ventrally there is no overlap (Text-fig. 19b). Shell surface pitted with furrow parallel to dorsal margin. Eye swelling usually poorly developed but may be prominent (PL 12, fig. 9). Hinge consisting of a long, smooth groove in the left valve into which fits the dorsal bar of the right valve, slightly downset from the dorsal edge of the valve (PL 12, fig. 12). Duplicature of moderate width with inner margin and line of concrescence coinciding. Approxi- mately 9 straight anterior marginal pore canals and about 2 posterior canals (Text-fig. 19c). Muscle scars consist of an oblique row of four oval to rounded adductor scars with a large V-shaped frontal scar (PL 12, fig. 13). Dimensions. Holotype, , female left valve (PL 12, fig. 7), length 0-39 mm ; height 0-24 mm. Paratypes : , female carapace (PL 12, fig. 8; Text-fig. 19b), length 0-43 mm ; height 0-26 mm ; width 0-27 mm ; , male left valve (PL 12, fig. 11), length 0-43 mm ; height 0-22 mm. , female right valve (PL 12, fig. 6), length 0-37 mm ; height 0-21 mm. , female left valve (PL 12, figs 10, 13), length 0-42 mm ; height 0-24 mm. , female left valve (PL 12, fig. 9), length 0-37 mm ; height 0-21 mm. , male right valve (PL 12, fig. 12), length 0-38 mm ; height 0-17 mm. , juvenile left valve (PL 12, fig. 5), length 0-31 mm ; height 0-18 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 perfectly res
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