408 



CHELOXIA. 



therefore incomplete. The columella auris is bony and reaches 

 from the fenestra ovalis to a small cartilage in the tym- 

 panum. In the mandible, the two dentaries are fused, as in 

 birds, and five pairs of other bones are present (articular, angular, 



m 990 SVpleton of Emvs europaea, in ventral view with plastron turned to one side 

 (from ChuS B plastron ; C costal plates ; Cl epiplastron (clavicle) ; Co cqracoid; F fibula ; 

 *v fpmiir H humerus ; J d entoplastron (interclavicle) ; Jl ilium ; Js ischium ; M marginal 



nlates VM nuchal, 

 radius'; Sc scapula ; T tib 



late ; Pb pubis ; Pco precoracoid (acromial process) ; R 

 ulna ; F neural plates. 



surangular, splenial, and coronoid). The hyoid consists of a 

 cartilaginous basilingual plate and of two pairs of ossified cornua, 

 which have no direct connection with the skull. 



Teeth are completely absent, but the jaws, both upper and 



