67 



Key to the In do-Australian genera. 



A. No femoral pores. 



I. A wing-like dermal expansion I. Draco^ p. 68. 



II. No wing-like dermal expansion, 



a. Tympanum hidden. 



1. A dorsal crest. 



I No fold across the throat, neither in front 



of the shoulder 5 scales small 2. Aphaniotis^ p, 88. 



tt Scales very large, irregular; tail prehensile 3. Copliotis^ p. 90. 

 ttt An oblique fold in front of the shoulder. 4. Japaluia^ p. 92. 



2. No dorsal crest. 



Scales small, intermixed with large conical 



tubercles 5. Phoxophrys^ p. 94. . 



b. Tympanum distinct. y^ 



1. Snout ending in a long compressed appendage 6. HarpesauiHSy\^. 96. 



2. Snout without appendage. 



t A strong fold across the throat. 



® Males with a gular sac; digits keeled 



inferiorly 7. Gonyocephahis^ p. 99. 



-:■;-:;; Males without gular sac; digits not 



keeled inferiorly 8. LophocaloUs^^. 116. 



tt No fold across the throat. 



a. Male with gular sac ; dorsal scales slightly 



unequal 9. Dcndragaina^ p. 1 1 7. 



b. Male with gular sac; dorsal scales equal. 10. Calotcs^ p. 120. v 



c. Male without gular sac; dorsal scales ,^, - 



unequal II. Acanthosaura^\>, 125. 



B. Femoral or praeanal pores present, at least in the 

 males. 



I. Neck with a large dermal collar 12. Chla?nydosaurus^ p. 126. 



II, No large dermal collar. 



1. Body compressed. 



a. A dorsal crest; throat with longitudinal folds; 

 tail strongly compressed, crested: femoral 



pores present; toes lobate 13. Lophura^ p. 128, 



b. A dorsal crest; tail r<^nd or slightly com- 

 pressed; femoral pores present; toes denti- 

 culated 14. Physignatlnis^ p. 131. 



2. Body depressed. 



a. No dorsal crest; tail round; one or two 



praeanal pores, no femoral pores 15, Diporophora^ p. 134. 



b. No dorsal crest; tail round; femoral pores 



present; skin of the sides expansible 16. Liolepis^ p. 135. 



