Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 535
re formerly includedin the Desmidiacece ; but, though doubtless related to them in certainparticulars, they present too many points of difference to be properlyassociated with them. Their chief point of resemblance consists inthe firmness of the outer covering, and in the frequent interruptionof… … Fig. 879.—Various phases of development of Pediasirum granulatum. metrical halves, and that they are always found in aggregation, whichis not, except in such genera as Scenedesmus which connect this groupwith the Desmids, in linear series, but in the form of discoidalfronds. In this tribe we meet…
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