Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 771
alwaysdouble or even triple, al-though, from being seen end on, only one may bevisible; and near these isgenerally to be seen a clearspace in each segment. Thedifference is still more strongly marked in the subsequent divisions ;for whilst the cleavage of the infertile eggs goes-on irregularly,…
Microscopy · Biology
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