. Handbook of zoology with examples from Canadian species, recent and fossil [microform]. Zoology; Invertebrates; Zoologie; Invertébrés. I Fi•,^ 301.—IJai'iiktks I'liAXicKrs, Owen, a Labyrinthodont from the (,'oal-fonnatloii of Nova Scotia. a—Anterior portion of the skull reducoil. ?>—Tooth, natural size. m •' Class III.—Reptilia. Heart ordinarily in three cavities {t7vo auricles and one ventricle); respiration by lungs; limbs, ivhen present, tisiially adapted for motion oji land; skin protected by scales or plates ; reproductioti oviparous or ovo-viviparous. The reptiles differ from the Am
. Handbook of zoology with examples from Canadian species, recent and fossil [microform]. Zoology; Invertebrates; Zoologie; Invertébrés. I Fi•,^ 301.—IJai'iiktks I'liAXicKrs, Owen, a Labyrinthodont from the (,'oal-fonnatloii of Nova Scotia. a—Anterior portion of the skull reducoil. ?>—Tooth, natural size. m •' Class III.—Reptilia. Heart ordinarily in three cavities {t7vo auricles and one ventricle); respiration by lungs; limbs, ivhen present, tisiially adapted for motion oji land; skin protected by scales or plates ; reproductioti oviparous or ovo-viviparous. The reptiles differ from the Amphibians in not under- going any metamorphosis, but are produced from the egg at once as air-breathing animals. In connection with this, their eggs are of larger size than those of fishes or batrachians, and the embryo is provided with special structures suited to the of hatching in the air (Amnion or water-sac, and Allantois or urinary-sac). In this respect the reproduction of the reptile resembles that of the bird. The reptiles have scaly skins and a single occipital condyle, and like the birds have the lower jaw i!li. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Dawson, J. W. (John William), Sir, 1820-1899. Montreal : Dawson
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Keywords: ., bookcentury1800, bookdecade1880, booksubjecti, booksubjectzoology
