Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 592
forms by the presence ofthe longitudinal line and central nodule. Although there are somefree forms in this family, the greater part of them, included in thegenus Gomphonema, have their frustules either affixed at their basesor attached to a stipe. This stipe seems to be formed by an exu-dation… … 546 MICROSCOPIC FORMS OF VEGETABLE LIFE it recommences a sort of joint or articulation is formed, from whicha new filament begins to sprout for each of the half-frustules ; andwhen these separate, they carry apart the peduncles which supportthem as far as their divergence can take place. It is in…
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