538 COLLEGE ZOOLOGY 



Family 7. TEIID.E. NEW- WORLD LIZARDS. SAURIA with 

 tongue long and bifid, with scale-like papillae; limbs 

 normal or reduced. Examples: Ameiva, Cnemido- 

 phorus. 



Family 8. AMPHISB^NID^E. WORM LIZARDS. Vermi- 

 form SAURIA with short tail; limbs absent (except in 

 Chirotes); girdles reduced; eyes and ears concealed; 

 skin divided into regular rings. Examples: Amphis- 

 bana, Monopeltis, Lepidosternon. 



Family 9. LACERTID.E. TYPICAL OLD-WORLD LIZARDS. 

 SAURIA with well-developed, pentadactyl limbs, with 

 sharp claws; tail long, brittle; tongue long, bifid, 

 with papillae or folds. Examples: Lacerta, Acantho- 

 dactylus, Eremias. 



Family 10. SCINCID.E. SKINKS. SAURIA with tongue 

 scaly, and only slightly nicked; limbs may be reduced 

 or absent; strongly developed bony plates on head and 

 body. Examples: Mabuia, Lygosoma, Eumeces. 

 Suborder 3. SERPENTES (OPHIDIA). SNAKES. Elongated 

 SQUAMATA without limbs; anal opening transverse; 

 copulatory organs paired; without movable eyelids, 

 tympanic cavity, urinary bladder and pectoral arch; 

 rami of lower jaw connected by ligament. (Four of 

 the nine families and several of the subfamilies are not 

 . included in the following list.) 



Family i. TYPHLOPID.E. BURROWING SNAKES. SER- 

 PENTES with reduced eyes covered by scales; without 

 teeth in lower jaw; pelvis represented by vestiges. 

 Examples: Typhlops, Helminthophis. 



Family 2. GLAUCONIID.E. BURROWING SNAKES. SER- 

 PENTES resembling the TYPHLOPID.E ; lower jaw toothed ; 

 vestiges of pelvis and hind limbs. Examples: Glau- 

 conia, Anomalepis. 



Family 3. BOID.E. PYTHONS and BOAS. SERPENTES 

 usually large, with vestiges of pelvis and .hind limbs; 



