Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 404
ouch. Its various species are very common in pools andditches.—This family is connected with the next by the genusNitzscMa, which is a somewhat aberrant form distinguished by thepresence of a prominent keel on each valve, dividing it into twoportions which are usually unequal, while the entire… … lv o.—Diatoma vulgare:—a, side view offrustule ; b, frustule undergoing self-division. iiig. 174.— Grammatophora serpentina:—a, frontand side views of single frustule; b, b, front andend views of divided frustule; e, frustule aboutto undergo self-division; d, frustule completelydivided. 344…
Microscopy · Biology
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