LIZARDS. 143 



When the tail has been reproduced, it is generally covered 

 with small square uniform scales, placed in cross series. Care 

 should be taken not to confound these with the tails of the nor- 

 mal structure, which has the scales all of the same structure and 

 fomi as those of the back, and generally (but not always) has a 

 central series of larger plates beneath. 



Synopsis of the Genera. 



I. Toes dilated, with 2 rows of membranaceous plates beneath, 



under the dilated part. 



A. Last joint of the toes short, infiexed, sheathed in the notch 

 betiveen the front of the 2 series of plates. Claws 5-5. 



a. Toes dilated, ovate, with 2 series of transverse equal plates beneath. 



1. Thecadactylus. Toes half webbed. Femoral pores none. 



Tail uniformly granular. 



b Toes linear, truncated, middle of the toes ivith 2 roivs of square 

 plates beneath, the 2 terminal plates larger. 



2. CEdura. Tail subcylindrical, with square scales, unarmed. 

 Toes all with 2 rows of small plates beneath. 



3. Stropiiura. Tail cylindrical, with 2 rows of spines above, tip 



revolute. The 2 middle toes with 2 rows, the rest with 1 row 

 of plates beneath. 



c. Toes linear, truncated, middle of toes tvith a single series of 

 plates beneath, 2 tenninal plates larger. 



4. Diplodactylus. Terminal pair of toe-plates convex, round- 

 ed at the end. Back and tail granular, uniform. 



5. Phyllodactylus. Terminal pair of toe-plates thin, square 



at the end. Back and tail tubercular. 



d. Toes slender, dilated at the end, with 2 diverging series of plates 



beneath. 



6. Ptyodactylus. Toes free. Body simple. Tail round. 



7. Uroplates. Toes webbed. Tail and side,' of the head and 

 body fringed. 



8. Caudiverbera. Toes webbed. Tail and back with a mem- 



branous crest. 



