Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 595
of such minute-differences as may be presented by forms discovered in newly ex-plored localities ; such differences as have already been pointed outbeing, probably, in a large proportion of cases, the result of the mul-tiplication of some one form, which, under modifying influences thatwe do not… … Fig. 41G.—Mastogloia Smithii: A, entire stipe; B, frustule in its gelatinous. envelope; C-F, different forms of frustule as seen in side view; G, front view; H, frustule undergoing subdivision.Fig. 417.—Mastogloia lanceolata. of variation is far greater than had been previously imagined yand this…
Microscopy
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