AGAMJANS. 239 



generic name of Uromastyx, (PI. 66, fig. 1) resemble the Chameleons 

 in their dentition, which seems at first sight to consist of a merely- 

 notched or dentated margin of the jaw. These processes are, how- 

 ever, true teeth, developed originally as independent parts, and after- 

 wards becoming confluent by their base and a great part of their outer 

 side with the alveolar parapet of bone. 



In the young of the Uromastyx there are from two to four anterior 

 or intermaxillary teeth which subsequently become anchylosed to- 

 gether, so as to appear like one lobated tooth. In the lower jaw the 

 crown of this complex tooth is received into a wide interspace between 

 the two anterior teeth. The molar teeth are triangular or subcylin- 

 drical, with rather obtuse and subcompressed summits : they are 

 approximated, and increase in size as they recede backwards. PL 66, 

 fig. 1, shows the form of the teeth, as seen from the inside of the jaw, 

 and the section below the figure demonstrates the thinning ofi" of the 

 base of the tooth produced by its oblique adhesion to the alveolar bony 

 plate. 



In the common Stellio most of the teeth, sixteen or seventeen on 

 each side, are triangular, with a small cusp in front and behind ; and 

 there are two larger, conical teeth, like canines, at the anterior part of 

 the upper and lower maxillary bones. The intermaxillary bones sup- 

 port two small conical teeth, which have no corresponding ones in the 

 lower jaw. The little flying Dragons (Draco), have proportionally 

 longer canines than the Stellios, but in other respects the dentition is 

 the same. 



The mutable Agamse (Trapelus) , resemble the Stellios in having two 

 conical teeth longer than the rest commencing the series in the lower 

 jaw and superior maxillary bones ; but they have four small conical 

 intermaxillary teeth, without corresponding teeth below ; seventeen 

 triangular teeth succeed the canines in the lower jaw and fifteen in 

 the upper jaw in the Trapelus ater. The dentition of the Agama 

 orbicularis resembles that of the Trapeli, except that the molar teeth 

 behind the canines are more conical. 



The inferior maxillary dental series commences in the common 

 Calotes with four simple conical teeth, and in the upper jaw with six, 

 of which the middle smaller ones might pass for incisors, and the 



