Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 374
lief that the cell is reallydouble (Fig. 158, a), though in other cases it is merely indicated bya slight notch; whilst the other is the frequency of projectionsfrom the surface, which are sometimes short and inconspicuous(Fig. 158), but are often elongated into spines, presenting a verysymmetrical…
Microscopy · Biology
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