Elementary Text-book of Zoology, Volume 2

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Macmillan, 1885 - Zoology
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Page 231 - Catalogue of the Shield Reptiles in the Collection of the British Museum, Part I., London 1855, Suppl., 1870, Append., 1872.
Page 140 - They are nervous apparatuses which in the arrangement of their parts may be compared to a Voltaic pile. They develop electricity, and give electrical discharges
Page 286 - The radius and ulna in the forelimb and the tibia and fibula in the hind-limb are
Page 302 - The placenta presents great variations in the individual orders, in its special development and in the mode of its connection with the uterine walls.
Page 346 - the white, or Caucasian, the yellow, or Mongolian, and the black, or Ethiopian
Page 9 - Mémoires pour servir à l'histoire et à l'anatomie des Mollusques.
Page 302 - chorion of the fœtus with the uterine walls gives rise to the Placenta, by means of which the nourishment and respiration of the
Page 343 - which are found in no other Mammal, have as completely failed. Further, the completely continuous row of teeth, interrupted by no gap for the opposed canines, a character by which the human dentition is distinguished from that of the Catarrhina, is not an exclusive human character, but is known in a fossil Ungulate
Page 17 - with one another; but the two canals, with their openings surrounded by tentacles, remain separate. In the most extreme cases the siphons are enormously enlarged, and the posterior region of the body is peculiarly elongated and uncovered by the rudimentary shell ; so that the whole animal acquires a vermiform appearance, the shell-bearing anterior
Page 71 - With the increase in our knowledge of their developmental history, it appears more and more probable, not only that the two groups are descended from an ancestral form common to them and the Annelids, but also that in spite of the considerable differences between them in the adult state, they

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