Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 549
he process of binary subdivision is repeat-edly performed, until the original single mass is replaced by a sortof morula (§ 391), each spherule of which shows the distinction be-tween the central and cortical regions, the former including a singlenucleus, whilst the latter is strengthened by… … Marginal portion of Actinosphcerium Ekhornii, as seen inoptical section under a higher magnifying power:—m, en-dosarc; r, ectosarc ; o, a, a, pseudopodia; n, n, nuclei withnucleoli; /, ingested food-mass. siliceous investment; and gradually grow into the likeness of theirparent. 402. A large number…
Microscopy · Biology
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