Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 659
Portions of the Section of Orbitoides Fortisii shown in Fig. 889, morehighly magnified;—a, superficial layer; b, median layer. last, minute punctuations may be observed, which seem to be theorifices of connecting tubes whereby they are perforated. Therelations of these two kinds of structure to…
Microscopy · Biology
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