. Introduction to zoology; a guide to the study of animals, for the use of secondary schools;. FKI. 2(!2. — The rattlesnake. The recoil after striking. Photographed inArizona and kindly lent by H. AV. Menke. Note in both figures the elevated rattle, toward the right. THE LIZARD AND ITS ALLIED 27!) moccasin or black moccasin, which inhabits the SouthernStates, and give;; no warning noise as does the copperhead of the eastern half of the United States isalso dangerous, but is mostly confined to wooded, moun-tainous regions. The rattlesnake was once common overthe whole of the Nor
. Introduction to zoology; a guide to the study of animals, for the use of secondary schools;. FKI. 2(!2. — The rattlesnake. The recoil after striking. Photographed inArizona and kindly lent by H. AV. Menke. Note in both figures the elevated rattle, toward the right. THE LIZARD AND ITS ALLIED 27!) moccasin or black moccasin, which inhabits the SouthernStates, and give;; no warning noise as does the copperhead of the eastern half of the United States isalso dangerous, but is mostly confined to wooded, moun-tainous regions. The rattlesnake was once common overthe whole of the Northern States as far west as the RockyMountains, but it is now nearly exterminated in well-settled districts. Related to these are the venomousvipers of Europe. The order Crocodilina contains only some twenty species,distributed in three genera. The gavial is the crocodile. FIG. 2bo, — Head of Allii/ator ini.^f.^ippieiifiis, the Mississippi alligator. From Leunis. of the (ranges River. It captures even large mammalsand man. The crocodile in the strict sense is found in theNile and other African rivers, in certain countries on thewestern border of the Pacific, and in northern SouthAmerica, Central America, and the Antilles. The Americanalligator, which has a different arrangement of the denti-tion from the crocodiles, occurs in seven slightly differingspecies, all of which are South American excepting the alli-gator of our Southern States. It feeds on fish, and attackshorses and even man (Fig. 2(53). 280 ZOOLOGY APPENDIX TO CHAPTER XVIII KEY TO THE FOUR ORDERS OF REPTILES «i. Trunk enclosed in a case composed of a dorsal anda ventral shield (carapace and plastron) ; jawswithout teeth ....... «.j. Without encasing shields ; teeth on jaws. b\. Teeth in special cups or alveoli; 4 legs; cloacal opening a longitudinal slitf>-2. Teeth not in special alve
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1900
