File:Image from page 286 of "Introduction to zoology; a guide to the study of animals, for the use of secondary schools;" (1900) (14598408809).jpg

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Identifier: introductiontozo00dave Title: Introduction to zoology; a guide to the study of animals, for the use of secondary schools; Year: 1900 (1900s) Authors: Davenport, Charles Benedict, 1866-1944 Davenport, Gertrude Anna Crotty, 1866- Subjects: Zoology Publisher: New York, Macmillan company London, Macmillian and co., ltd. Contributing Library: MBLWHOI Library Digitizing Sponsor: MBLWHOI Library


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Text Appearing Before Image: s . Anura KEY TO THE FAMILIES OF URODELA a\. External gills persistent throughout life ; maxil-lary bone small or wanting.61. Body eel-like ; hind legs absent; jaws with horny sheath ...... Siroiilir 1>>2. Body salamander-like ; hind limbs present; teeth on jaws Proteidcu «2- External gills normally disappearing in adult; limbs 4 ; maxillaries present.&i. Side of neck with spiracular opening ; no eyelids. ex. Limbs rudimentary .... Amphiwnidaic-2. Limbs well developed .... Cryptobranchidceb->. Side of neck without spiracular opening inadult; eyelids present. APPENDIX TO CHAPTER XVII 267 Ci. Palatine teeth in transverse (or nearly transverse) series.d\. Vertebrse doubly concave. e\. Parasphenoid without teeth ; tongue large ; toes 4-5e-2. Parasphenoid with teeth; tongue smalld*. Vertebras convex behind only ; tongue moderate ; toes 5C2. Palatine teeth in 2 longitudinal series,diverging behind .... AmblystomidcB Plethodontidce Desmognathidce Pleurodelidcp.(Ex. Diemyctylus)

Text Appearing After Image: CHAPTER XVIII THE LIZARD AND ITS ALLIES THE lizards belong to the class of Reptiles,1 which arevertebrates in whose skin horny or bony scales or platesare formed. They constantly breathe by means of lungs,and lay large eggs provided with a tough leathery orcalcareous shell. The Sauria, or lizards, constitute a large order charac-teristic of the tropical and subtropical countries andreaching the maximum of its development in SouthAmerica, while in the northern continents it is relativelypoorly represented. Lizards are, as a rule, carnivorous,and since they destroy insects injurious to vegetation, theymay be counted as beneficial to man. Anolis2 is one of the family Iguanidae,3 a large group oflizards characteristic of the Western Hemisphere. Thefamily is known by the thick tongue, by a large scalein the middle of the head in front of the eyes, and by thefact that all four legs are Avell developed. The genusAnolis contains eighty tropical species. Our species livesin pine woods from the


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Source Image from page 286 of "Introduction to zoology; a guide to the study of animals, for the use of secondary schools;" (1900)
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