Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 405
s and in thepresence of a longitudinal keel, in the Sub-family Nitzschiece, whichranks as a section of the ISurirellece.—Another Sub-family, Syne-clreai, consists of the genus Synedra and its allies, in which thebacillar form is retained (Fig. 192, I), but the keel is wanting, andthe valves are but… … Swrirella const ricta:—A, side view; B, front view;c, binary subdivision. than the front view. The distinctive character of the genusSurirella, in addition to the presence of the supposed canaliculi(§ 275), is derived from the longitudinal line down the centre ofeach valve (a), and the prolongation…
Microscopy · Biology
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