Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 590
in the former the frustulesare usually free, though they have occasionally been found in chains. Another group that seems allied to the Biddulphiece is the curiousassemblage of forms brought together in the family Chcetocerece, someof the filamentous types of which seem also allied to the… … Fig. 409.—Chcetoceros Wighamii: a, front Fig. 410.—Bacteriastrum view, and b, side view of frustule ; c, side furcatum.view of connecting hoop and awns;d, entire filament. by the interlacing of which the frustules are united into filamentswhose continuity, however, is easily broken. In the genus…
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