File:Rare and remarkable animals of Scotland, represented from living subjects- with practical observations on their nature (1847) (14755103816).jpg

Identifier: rareremarkablean01daly (find matches)
Title: Rare and remarkable animals of Scotland, represented from living subjects: with practical observations on their nature
Year: 1847 (1840s)
Authors: Dalyell, John Graham, Sir, 1775-1851
Subjects: Zoology -- Scotland Zoology
Publisher: London, J. Van Voorst
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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ion, and motion combined with their multiplicity, are per-petual obstacles. An opaque reddish or brown ovular substance appearsin the body, rising somewhat along with its ascent in the cell. Manyvacant cells also contain a dark globular substance at the bottom. Seve-ral authors are disposed to conclude that what is thus seen as a residuum,is the body of the hydra remaining permanently after death. But I havenot understood that in either case the nature of the substance is sufficientlyascertained. Hydra;, no doubt, sometimes die in retreat, neverthelesstheir soft and perishable organs, for the most part, waste away impercep-tibly. White corpuscula, very minute, and some of larger dimensions, havebeen produced in vessels containing specimens of this zoophyte in Augustand December. They swim actively, and in most respects resemble thosedescribed in the next paragraph. One which admitted of closer inspec-tion, proved opaque under the microscope, of soft a)>pearance and variable FLxrvn.
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y y^-////^///^/ y////-//^/ CELLULARIA. 241 form. Some were like an obtuse-angled parallelepiped, apparently pro-vided with a ciliated apparatus below, in front. It was difficult to attemptfollowing their history. Stationary globules have been likewise observedamong the parts of specimens, but numberless interceptions prevented adistinct view of them.—Fig. 7. In early stages the product exhibits a singular formation, as may beseen in various nascent specimens, which originated on each side of thestem of a different zoophyte.—Fig. 8. A second long cell seems belong-ing to the first, both apparently guarded by a greater number of spinesthan peculiar to maturity.—Figs. 9, 10. The root is formed of forking radicles.—Fig. 11. Many avicularia, which are extremely minute and transparent, borderthe different parts of this Cellularia. Plate XLVII. Fig. 1. Cellularia ciliaia—Ciliated Coralline. 2. The same enlarged. 3. Branch. 4. The same enlarged. 5. Branch of another specimen. 6. Por

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