File:The microscope and its revelations (1856) (14778161415).jpg

Identifier: microscopeitsrev1856carp (find matches)
Title: The microscope and its revelations
Year: 1856 (1850s)
Authors: Carpenter, William Benjamin, 1813-1885
Subjects: Microscopy Microscopes Microscopy
Publisher: London : John Churchill
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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ving an active spontaneous motion, and KEPKODUCTION OF CH-5:T0PH0EACE^. 357 therefore corresponding precisely to the antherozoids of thetriiLY sexual Protophytes.* 200. The ClKEtophoyaceo! constitute another beautiful andinteresting little group of Confervoid plants, of ^hich somespecies inhabit the sea, whilst others are found in fresh andpuie water, rather in that of gently-moving streams, however,than in strongly-flowing cuiTcnts. Generally speaking, theii-filaments put-forth lateral branches, ^i^- 109- and extend them-selves into arbo-rescent fronds;and one of the dis-tinctive charactersof the group isafforded by thefact, that the ex-tremities of thesebranches are usu- \>ally prolonged intobristle-shaped pro-cesses (Pig. 109).As in many pre-ceding cases, theseplants multiplythemselves by theconversion of theendochromeof cer-tain of their cellsinto zoospores;and these, whenset-free, are seen tobe fuimished withfour large cilia. Resting - sporeshave also been seenin many species;
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Branches of CJKBtophora elegans, in the act ofdischargmg ciliated zoospores, which are seen, as inmotion, on the right. * This group of plants seems to serve as the connecting Link between thosesimple Protophytes in which the sexes are not jet differentiated, and thosehigher forms in which the distinction between the sperm-cells and germ-cells is very apparent. For let it be supposed that in Sphceroplea (§ 198) a con-jugation of two adjacent cells were to take place, at that stage in their develop-ment in which the endochi-ome is uniformly arranged in rings, no differentiationof sexes yet showmg itself,—the process would in all respects correspondwith that of the ordinary Conjugatese. Agaui, whilst in Mesocarpus, the 358 ^MiCEOscopic POEMS OF at;getable life. and it is probable that these, as in Confervacese, are truegenerative products of the fertilization of the contents of germ-cells by antherozoids developed within sperm-cells(§ 198).—Nearly allied to the preceding are the B

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