430 



COLLEGE ZOOLOGY 



Vertebrae biconcave, often con- 

 taining remains of notochord; 

 parietal organ present. Ex. 

 Sphenodon punctatus (Fig. 283). 

 Order 3. Squamata. Lizards and snakes. 

 Reptiles usually with horny ep- 

 idermal scales; vertebrae usually 

 procoelus; quadrate bones mov- 

 able. 

 Suborder 1. Sauria. Lizards. Cloacal open- 

 ing transverse; paired copu- 

 latory organs; usually well- 

 developed limbs; rami of 

 lower jaw united. 

 Family L Gekkonidae. Geckos (Fig. 

 274). Ex. Tarentola mauren- 

 tanica, wall gecko. 

 Family 2. Iguanidae. New World liz- 

 ards. Ex. Anolis carolinensis, 

 American "chameleon" or 

 green anole (Fig. 285). 

 Family 3. Agamidae. Old World liz- 

 ards. Exs. Draco volans, 

 "flying" lizard (dragon), and 

 Agama (Fig. 274). 

 Family 4. Chamaeleonidae. Chame- 

 leons. Ex. Chamaeleo chC' 

 maeleon, true Chameleon 

 (Fig. 274). 

 Family 5. Lacertidae. Typical Old 

 World lizards. Ex. Lacerta 

 viridis, green lizard. 

 Family 6. Scincidae, Skinks. Ex. Eu- 

 meces antracinus (Fig. 284). 

 Family 7. Amphisbaenidae. Worm liz- 

 ards. Ex. Rhineura floridana, 

 Florida worm lizard. 

 Family 8. Helodermatidae. Beaded liz- 

 ards. Ex. Heloderma suspec- 

 tum, Gila monster (Fig. 

 296). 

 Family 9. Anguidae. Old and New 

 World lizards. Ex. Ophisau- 

 rus ventralis, "glass snake" 

 (Fig. 274). 

 Suborder 2. Serpentes. Snakes. Elon- 

 gated; no limbs; cloacal open- 

 ing transverse; copulatory or- 

 gans paired; without movable 

 eyelids, tympanic cavity, 

 urinary bladder, and pectoral 



arch; rami of lower jaw con- 

 nected by ligament. 

 Family I. Leptotyphlopidae. Blind 

 snakes. Ex. Leptotyphlops 

 dulcis, Texas blind snake. 

 Family 2. Boidae. Pythons and boas. 

 Ex. Boa constrictor, boa con- 

 strictor (Fig. 290). 

 Family 3. Colubridae. Harmless 



snakes. Ex. Thamnophis 

 sirtalis, garter snake (Fig. 

 292). 

 Family 4. Crotalidae. Pit vipers. Exs. 

 Crotalus horridus, timber 

 rattlesnake (Fig. 301), 

 Agkistrodon contortrix, cop- 

 perhead and Agkistrodon 

 piscivorus water moccasin. 

 Order 4. Crocodilia. Crocodiles, alligators, 

 gavials, and caimans. Vertebrae 

 procoelous; nostrils paired, at end 

 of snout; cloacal opening longi- 

 tudinal. 

 Family L Gavialidae. Gavials. Ex. 

 Gavialis gangeticus, Indian 

 gavial. 

 Family 2. Alligatoridae. Alligators and 

 caimans. Ex. Alligator mis- 

 sissippiensis, American alli- 

 gator (Fig. 295). 

 Family 3. Crocodylidae. Crocodiles. 

 Ex. Crocodylus acutus (Fig. 

 294). 



SELECTED COLLATERAL 

 READINGS 



(See also Chapter 27) 



Ashley, L.M. Laboratory Anatomy of the Tur- 

 tle. W.C. Brown, Dubuque, Iowa, 1955. 



Bogert, CM., and del Campo, R.M. The Gila 

 Monster and Its Allies. Am. Mus. of Nat. 

 Hist. Bull. 109:1-238, 1956. 



Carr, Archie. Handbook of Turtles. (Com- 

 stock) Cornell Univ. Press, Ithaca, N.Y., 

 1952. 



Colbert, E.H. The Dinosaur Book. McGraw- 

 Hill, New York, 1951. 



