I THINK there can be little doubt that the Amœbæ referred to by Mr. Orton in NATURE of November 27 are not independent organisms, but constituents of the sponge from which he obtained them. I have ...
MR. BIDDER is perfectly right. The Aœmbæ described by Mr. Orton are far too large to be metamorphosed collared cells or even young amboid germ cells. The only cells in the sponge (Grantia compressa) ...
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