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Some Studies on the New Zealand Oysters

Text-fig. 1.—General systematics of O. angasi and O. lutaria. Fig. A—General diagram of O. lutaria. Fig. B—Variation of the posterior adductor muscle scar in O. lutaria. Fig. C—General diagram of O. angasi. Fig. D—Variation of the posterior adductor muscle scar in O. angasi

Text-fig. 1.—General systematics of O. angasi and O. lutaria. Fig. A—General diagram of O. lutaria. Fig. B—Variation of the posterior adductor muscle scar in O. lutaria. Fig. C—General diagram of O. angasi. Fig. D—Variation of the posterior adductor muscle scar in O. angasi.

Text-fig. 1.—General systematics of O. angasi and O. lutaria. Fig. A—General diagram of O. lutaria. Fig. B—Variation of the posterior adductor muscle scar in O. lutaria. Fig. C—General diagram of O. angasi. Fig. D—Variation of the posterior adductor muscle scar in O. angasi.

Abbreviations: a.s., anterior suture; c., catch muscle; exh.c., exhalent chamber; l.m., left mantle notch; p., palps; per., pericardium; p.s., posterior suture; q., quick muscle; v.m., visceral mass.