164: STORY OF THE REPTILES 



E. Rigid lung largest or active. (12) Amphishmnidce. 

 EE. Left lung largest or more active. 



F. Skin distinctly warty — not scaly; teeth grooved. 



(9) HelodermatidcB. Gila Monster, 

 FF. Skin not warty ; either scaly or smooth. 

 G. Fold of skin obvious along side of body. 



(7) Girdled Lizards. 

 GG. Fold of skin not obvious or present. 



H. Tongue distinctly forked or with two points 

 at tip. 



I. Tongue scaly, rough, or wrinkled above. 



Teiid(B or (11) Greaved Lizards. 



II. Tongue not scaly or wrinkled; sometimes 



mei'ely brushlike. 

 K. Tongue sheathed at base. Varanidce or 



(10) Monitors. 

 KK. Tongue exposed everywhere. 



(13) Lacertidce. 

 nil. Tongue not distinctlg forked, or double- 

 l^ointed ; sometimes merely notched. 

 L. Scales of body underlaid, and roof 

 of skull behind overlaid, with flat 

 bones; scales not arranged in rows. 

 M. Tongue sheathed at the tip. 



(8) Blindworm Trihe, Anguid(e. 

 MM. Tongue not sheathed at tip. 

 (14) Skinl- Trihe. 

 LL. Scales and skull devoid of the 

 bones noted ; scales in rows, usu- 

 ally oblique. 

 N. Teeth on upper edge of jaws. 



(15) Agamidw. 

 NN. Teeth on sides of jaws. 



(16) IguanidcB. 



The nnml)ers l)efore the family name refer to the 

 order of Mr. Lv(lekkei"\s families. 



The Aganddce are a large Old World family in 



