A Manual Of The Sub-kingdom Protozoa; With A General Introduction On The Principles Of Zoology

Paperback | January 14, 2012

byJoseph Reay Greene

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This historic book may have numerous typos, missing text or index. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. 1863. Not illustrated. Excerpt: ... PEOTOZOA. CHAPTER I. PROTOZOA I. General characters.--2. Classification. I. General characters.--The sub-kingdom Protozoa includes a number of animal beings of simple organisation, many of which have, until recently, been associated with the lower members of the vegetable kingdom. Hence no good general definition can be given of this sub-kingdom, the several forms which it includes being distinguished from those which are placed in the four remaining zoological departments by chiefly nega tive characters. In none or the Protozoa do we find a nervous system or organs of sense, and, in many of these animals, the existence of a distinct alimentary apparatus has yet to be ascertained. In the substance of the bodies of most Protozoa a minute solid particle known as the 'nucleus' is found to occur; and, in addition to this, the presence of certain clear spaces termed 'contractile vesicles' may, in some species, be traced. B In a large number of the Protozo i tiue sexual reproduction has not yet been proved to take place. In habit the Protozoa are almost exclusively aquatic. Some attain to an appreciable, and even (in the case of the Sponges) considerable, size; but by far the greater number are minute, and hence, notwithstanding their abundance, the ignorance which still prevails as to their real nature. a. Classification.--The following animal groups are include 1 in this sub-kingdom, viz. --i. Rhizopoda, %. Polycystina, 3. Spongidce, 4. Thalassicollidce, 5. Gregarinidce, 6. Infusoria. The presence of a mouth is characteristic of the Infusoria, and hence the remaining Protozoa are sometimes designated by the collective appellation of' Astomata? CHAPTER IL KHIZOPODA. I. Type of the group: Amoeba.--2. Nature of Rhizopoda.--3 Rhizopoda allied to Amoeba.--4. Classificati...

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This historic book may have numerous typos, missing text or index. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. 1863. Not illustrated. Excerpt: ... PEOTOZOA. CHAPTER I. PROTOZOA I. General characters.--2. Classification. I. General characters.--The sub-kingdom Protozoa includes a ...

Format:PaperbackDimensions:26 pages, 9.69 × 7.44 × 0.05 inPublished:January 14, 2012Publisher:General Books LLCLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:0217015751

ISBN - 13:9780217015752

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