14 CONTENTS 



PAGE 



Family 16. Crotalid^ 893 



The Poison Apparatus- 894 



The Nature and Action of Venom . 899 



Treatment of Snake Bite 901 



47. Sistrurus 905 



catenatus 



edwardsii (Edwards Massasauga) 905 



48. Crotalus 908 



molossus (Blacic-tailed Rattlesnake) 911 



atrox (Desert Diamond Rattlesnake) 914 



tortugensis (Tortuga Island Diamond Rattlesnake) 918 



exsul (Red Diamond Rattlesnake) 919 



lucasensis (San Lucan Diamond Rattlesnake) _ 925 



confluentus (Prairie Rattlesnake) 926 



orcganus (Pacific Rattlesnake) 930 



enyo (Lower California Rattlesnake) 945 



tigris (Tiger Rattlesnake) 947 



mitchellii (Bleached Rattlesnake) 949 



cerastes (Horned Rattlesnake) 953 



willardi (Willard's Rattlesnake) 958 



lepidus (Blue Rattlesnake) 961 



pricei (Price's Rattlesnake) 963 



Order II. TESTUDINATA 965 



Family 1 7. Kinosternid;e 966 



49. Kinosternon 966 



sonoriense (Sonoran Mud Turtle) 967 



flavescens (Yellow-necked Mud Turtle) 970 



Family 18. Testudinid.« 972 



50. Clemmys 973 



marmorata (Pacific Terrapin) 974 



51. Pseudemys 978 



nebulosa (Lower California Turtle) 978 



52. Chrysemys . 980 



marginata 



bellii (Western Painted Turtle) 981 



53. Terrapene 984 



ornata (Ornate Box Tortoise) 985 



54. Gopherus _ 986 



agassizii (Desert Tortoise).- 987 



