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absent Africa alimentary allantois Amphibia animals anus apertures Apes appendages arch arteries Ascidians beak Birds body cavity bones bony branchial branchial arches branchial cavity buccal canal canines Carnivora cartilaginous caudal Cetacea ciliated claws cloaca connected covered cranial dentition developed digits dorsal duct edge eggs elongated embryo endostyle external eyes feathers feet female fins fishes folds foot fused ganglia ganglion gills glands grinders head hind horny incisors intestine kidney larva lateral legs limbs Lizards lobes lower jaw male Mammalia mantle Marsupials median membrane metatarsus mouth movable muscles nasal nerves notochord oesophagus opening operculum organs oviduct paired pharynx placed placenta plates possess posterior prehensile present region remiges respiratory ribs rudiment rudimentary scutes shell short side Sirenia skin skull snout sometimes South species spiral structure Sub-order surface swimming tail teeth tentacles thoracic toes transverse tympanic tympanic cavity unpaired usually valves ventral ventricle vertebral column
Page 231 - Catalogue of the Shield Reptiles in the Collection of the British Museum, Part I., London 1855, Suppl., 1870, Append., 1872.
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