File:The microscope and its revelations (1856) (14777925392).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

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
wever, only a single ofi^spring is developedfrom the nucleus of the original cell-body, which offspringmay have an entirely dissimilar form; and this latter changeoccurs in Vorticella, in conjunction with other peculiaritiesof a very remarkable kind. Por the encysted YorticeUabecomes changed into the form of an Acineta (closely resem-bling that of Actinophrys), as shown in Pig. 198, f; and thismay acquii^e a new stalk, so as to correspond with a Podopkrya(g). At the same time, its band-like nucleus becomes entirelymetamorphosed into a free body of ovate form, which carriesat its narrower end a circlet of long vibrating cilia, while itsmore obtuse end is perforated by a mouth which communicateswith a distinct oral cavity. In the interior of this offspring(h), we already observe a long oval nucleus (b) and a round11 482 MICROSCOPIC POEMS OE ANIMAL LIFE. contractile vesicle (c), and its whole aspect is that of a youngVorticella-budjust ready to quit its stock. This body escapes Fia. 198.
Text Appearing After Image:
Development and Metamorphoses of Vorticella microstoma:—A, full-grown individual in its encysted state; a, retracted oval circletof cilia; h, nucleus; c, contractile vesicle;—b, a cyst separated fromits stalk;—c, the same more advanced, the nucleus broken-up intospore-hke globules;—d, the same more developed, the original bodyof the VorticeUa, d, having become sacculated, and containing manyclear spaces;—e, one of the sacculations having burst through theenveloping cyst, a gelatinous mass, e, containing the spores, is cUs-charged;—F, transformation of encysted VorticeUa (b) into form ofAcineta; h, ntieleus;—G, stalked Aeineta-form of Vorticella, enclosinga young one, the result of the transformation of fhe nucleus;—h,young free Vorticella; a, b, c, as in Fig. 1; ff, posterior circlet of cilia. INrUSOKIA :—ENCYSTING PROCESS. 483 from the interior of the Aciueta by a gap formed in some partof its wall, which, however, soon closes again, and the Aciiietagoes-on stretchi

Note About Images