Spat Oyster spats at different short intervals after fixation.... The larval shell (prodissoconch) maintains the same size as long as it can be recognized in a spat. Larval shells of all spats maintain approximately the same size, no matter how large the spats grow. In all the figures the prodissoconch is shaded, the dissoconch only outlined. The spats soon become so large that a lower power objective has to be used in order to see the whole spat at once.
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