Morphology of the black-lip oyster.

The sample has been stored in ethanol, causing some shift in colour within the internal soft tissues. A. Upper surface of the right valve, showing intense dark pigmentation. The outer shell layer has been chipped away at the umbo (arrowhead). B. Inner surface of the right valve. The dark outer shell margin is sharply separated from the white internal surface by large, obvious chomata (ch). The mantle edge is darkly pigmented (m). C. Outer surface of the deeply-cupped left valve. D. Inner surface of the left valve, showing a dark outer shell margin and obvious chomata, and dark pigmentation in the mantle E. Inner surface of the left valve of a second specimen, with soft tissues removed to display the adductor scar (arrowhead). Scale bar = 10mm.