IGTTANIDJ5. •> 



** Xo transverse gular fold ; occipital shield small, 

 t A gular appendage. 

 Body compressed 5. Tropidodactyliis, p. 97. 



ft Xo gular appendage. 

 X Males with anal pores. 

 Dorsal scales smooth and juxtaposed 23. Heloceplialus, p. 137. 

 Dorsal scales keeled and imbricate. . 24. Liolsemus, p. 138. 

 X+ Ivo anal pores. 



§ Caudal scales forming verticils. 



Abdominal ribs ; dorsal and ventral scales large and keeled. 



15. Scartiscus, p. 127. 



No abdominal ribs 21. Stenocerciis, p. 131. 



§§ Caudal scales not forming verticils. 



No abdominal ribs ; bodj- slightly depressed; head-scales small and 

 keeled 25. Saccodeira, p. 158. 



Abdominal ribs ; body more or less compressed. 



2(3. Liocephalus, p. 100. 



b. Jnfradigital lamcllas smooth or indistinctly keeled. 



«. A transverse gular fold; no anal pores. 



* Body cylindrical or feebly compressed. 



A slight dorsal crest or denticulation. 



12. Enyalins, p. 117. 



No crest ; dorsal lepidosis heterogeneous. 



13. Anisolepis, p. 122. 



No crest ; dorsal scales uniform, granular, 



14. Urostrophiis, p. 123. 



■** Body depressed ; no dorsal crest. 

 Lateral teeth tricuspid 15. Liosaiu'iis, p. 124. 



Lateral teeth with obtuse or subspherical crowns. 



16. Diplolaemiis, p. 125. 



/3. No gular fold ; male with anul pores. 



22. Ctenoblepliaris, p. 13G. 



2. Praemaxillary teeth tricuspid. 

 Body much depressed 31. Phymatiirus, p. 184. 



