538 COLLEGE ZOOLOGY 



Family 7. TEIID^:. NEW-WORLD LIZARDS. SAURIA with 

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

 normal or reduced. Examples: Ameiva, Cnemido- 

 plwrus. 



Family 8. AMPHISB^ENID^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: Amplris- 

 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, Acanilio- 

 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: TypMops, Helminthophis. 



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

 PENTES resembling the TYPHLOPID^: ; lower jaw toothed ; 

 vestiges of pelvis and hind limbs. Examples: Glau- 

 conia , A nomalepis. 



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

 usually large, with vestiges of pelvis and hind limbs; 



