DRACO. 121 



c. No lateral wings ; tympanum naked. 

 f Only four toes behind. 

 Scales regularly arranged Sitana, p. 134. 



** Crest on the back very high, the lobes being united by a membrane. 



Scales minute, equal Dilophyrus, Tp.136. 



*** five toes behind ; lobes of the dorsal crest separate. 



Scales on the sides equal in size, regularly arranged, with the tips directed 



backwards and downwards ; no spines on the head Bronchocela, p. 137. 



Scales on the sides equal in size, regularly arranged, \rith the tips directed 



backwards and upwards ; subcaudal scales as broad as long Ca/o^es, p. 139. 



Scales on the sides of moderate size, strongly keeled, arranged in longitudinal 

 series ; a series of some larger distant scales along the side ; head -nathout 

 any spines Salea, p. 145. 



Scales on the sides of moderate size, with the tips directed backwards and 

 upwards ; larger ones are scattered between the others ; a spine behind 

 the orbit ; subcaudal scales as broad as long Oriocalotes, p. 146. 



A spine behind the orbit ; subcaudal scales longer than broad Acanthosaura, p. 147. 



Scales on the sides very small, irregular, and unequal in size ; a tubercle behind 



the orbit; subcaudal scales as broad as long; gular sac none Oriotiaris, p. 150. 



Scales on the sides small, with scattered larger ones ; no spine behind the orbit ; 



gular sac present, at least in the males Tiaris, p. 151. 



II. Femoral pore^ present. 

 Tympanum naked Physignathus, p. 152. 



B. Tree Agames, with the trunk depressed, and with a very long tail. 



Femoral pores present Liolepis, p. 153. 



C. Ground Agames, stout in habit, with the body depressed, and with the tall of moderate length. 



Femoral and prseanal pores Uromastix, p. 155. 



No pores ; scales of the tail arranged in rings, those of the sides equal in size . Charasia, p. 156. 



No pores; scales of the tail arranged in rings, those of the sides unequal . . Stellio, p. 157. 



Scales of the tail not arranged in rings ; tympanum naked TVajoe^M*, p. 159. 



Scales of the tail not arranged in rings ; tympanum scaly Phrynocephalus, ^.l&d. 



(Appendix Brachysaura, p. 161.) 



DRACO, Linn. 



A semicircular membrane, supported by the five or six posterior (false) ribs, 

 which are much prolonged, forms a sort of wing- or parachute on each side 

 of the body. A vertical appendage is suspended from the niitUlle of the throat ; 

 a smaller horizontal fold of the skin on each side of the gular appendage. 



The Dragons are entirely confined to the East Indies ; they are more numerous in the 



