. Elements of zoölogy : a textbook. Zoology. LABYRIMTHODONTA OR LABYRINTHODOXTS. 245 Labyrinthodonts are found in the Carboniferous and Triassic rocks, and FlQ- 285- some of the species are of gigantic size, having in some cases a skull three or four feet long, and a body vastly more bulky, prob- ably, than that of an ox. Represen- tatives of this or- der have left their foot-prints in the Connecticut river sand-stone, each foot-print being twenty inches Magnified Cross-section of about one quarter of a tooth of a Labyrinthodont. PRINCIPAL TOPICS CONSIDERED IN CHAPTER II., SECTION V. SU
. Elements of zoölogy : a textbook. Zoology. LABYRIMTHODONTA OR LABYRINTHODOXTS. 245 Labyrinthodonts are found in the Carboniferous and Triassic rocks, and FlQ- 285- some of the species are of gigantic size, having in some cases a skull three or four feet long, and a body vastly more bulky, prob- ably, than that of an ox. Represen- tatives of this or- der have left their foot-prints in the Connecticut river sand-stone, each foot-print being twenty inches Magnified Cross-section of about one quarter of a tooth of a Labyrinthodont. PRINCIPAL TOPICS CONSIDERED IN CHAPTER II., SECTION V. SUB-SECTION I. The Batrachia considered as a Class. Origin of the name. Where they lay their eggs. The young. Skull. Breathing apparatus. Heart. Classifi- cation. SUB-SECTION II. The Order of Anoura. Origin of the name. Form. Skin. How they secure food. The young. True Frogs. " ; Toads. Eggs of Toads. Eggs of Frogs. SUB-SECTION III. The Order of Urodela. Origin of the name. Form and Structure. Sala- manders proper. Tritons. Amphiumidaa or "Congo ; Sirenidee or Siredons, etc. The Order of SUB-SECTION IV. -Form. Size. Where found. Eyes. Scales. SUB-SECTION V. The Order of Labyrinthodonta. Why so named. Where 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 Tenney, Sanborn, 1827-1877. New York : Scribner
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