A Manual of the Sub-kingdom Protozoa: With a General Introduction on the Principles of ZoologyLongmans, Green, Longman, Roberts, & Green, 1863 - 88 Seiten |
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Acineta Actinophrys Algæ allies Amaba Amoeba animal forms annular apertures appearance Arcella ARCELLINA arrangement becomes canals carapace cavity cells chambers cilia Classification composed consists contained contractile vesicle convolutions cortical layer cyst D'Orb D'Orbigny destitute Difflugia digestive disk distinct Distribution Dujardin Ehrenberg entire shell existence external fission Foraminifera functions furnished gelatinous gelatinous substance gemmation gemmule Grantia greater number Gregarinida Gromia HELICOIDEA Hence Infusoria interior Lagena latter Lieberkühn locomotion margin membrane Miliolina minute mouth Müller's Archiv naturalists nature nautiloid Noctiluca Nodosaria nucleolus nucleus Nummulites observed occur oesophagus Orbitolites organisation organs orifice oscula ovate Oxytricha parenchyma particles peculiar peristome placed Polycystina Polythalamia pores portion posterior present Protozoa protruded pseudopodia radiating RADIOLARIA regarded Rhizopoda round sarcode body sarcode substance segments septal plane siliceous Silurian species specimens spermatozoa spicula spiral Sponges Spongilla stalk stolons structure sub-kingdom surface termed Tethya Textularia tion true usually Vorticella whilst zone
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Seite 25 - Africa, as, for example, in Algeria and Morocco. It has also been traced from Egypt, where it was largely quarried of old for the building of the Pyramids, into Asia Minor, and across Persia by Bagdad to the mouths of the Indus. It occurs not only in Cutch, but in the mountain ranges which separate Scinde from Persia, and which form the passes leading to Caboul ; and it lias been followed still farther eastward into India, as far as eastern Bengal and the frontiers of China.
Seite 25 - The nummulitic formation, with its characteristic fossils, plays a far more conspicuous part than any other tertiary group in the solid framework of the earth's crust, whether in Europe, Asia, or Africa. It often attains a thickness of many thousand feet, and extends from the Alps to the Carpathians, and is in full force in the north of Africa, as, for example, in Algeria and Morocco. It has also been traced from Egypt, where it was largely quarried of old for the building of the Pyramids, into Asia...
Seite 25 - It often attains a thickness of many thousand feet, and extends from the Alps to the Carpathians, and is in full force in the north of Africa, as, for example, in Algeria and Morocco. It has been traced from Egypt — where it was largely quarried of old for the building of the pyramids — into Asia Minor, and across Persia, by Bagdad, to the mouth of the Indus.
Seite 10 - Entomostega. — Body consisting of alternate segments spirally arranged : shell chambers disposed on two alternating axes forming a spiral. 5. Enallostega. — Body composed of alternate segments not forming a spiral : chambers arranged on two or three axes which do not form a spiral. 6.
Seite 38 - TrsV^th of an inch in diameter, and of spermatozoa in every stage of development from those cells. The cell throws out a long filament which becomes the tail of the spermatozoon, and becoming longer and pointed forms, itself, the head. The perfect spermatozoa have long, pointed, somewhat triangular heads about ^in)otn of an inch in diameter, with truncated bases, from which a very long filiform tail proceeds.
Seite xxvi - The sub-kingdoms are, in turn, broken up into classes, classes into orders, orders into families, families into genera, and genera into species.
Seite xxx - OWEN. — LECTURES ON THE COMPARATIVE ANATOMY AND PHYSIOLOGY OF THE INVERTEBRATE ANIMALS, delivered at the Royal College of Surgeons in 1843. By RICHARD OWEN, FRS Hunterian Professor to the College. From Notes taken by William White Cooper, MRCS and revised by Professor Owen.
Seite xxvi - Quatrefages defines species as "an assemblage of individuals, more or less resembling one another, which are descended, or may be regarded as being descended, from a single primitive pair by an uninterrupted succession of families." Miiller defines species as "a living form, represented by individual beings, which reappears in the product of generation with certain invariable characters, and is constantly reproduced by the generative act of similar individuals.
Seite 10 - Body consisting of segments wound round an axis : chambers arranged in a similar manner, each investing half the entire circumference. A somewhat different arrangement has been adopted by Schultze, who divides the Polythalamia into three sections, viz. — 1. Helicoidea, including those forms in which the several chambers of the shell are arranged in a convolute series, and answering to the last four orders of d'Orbigny. 2.