20 



MR. P. E. BEDDARD ON THE 



[Jan. 17, 



dorsal half of the hyoid. It appears to me that this projecting 

 bit of cartilage (a) is the equivalent of the thickened region of 

 the hyoid of Lacerta figured by Parker*. This projecting bit in 



Text-fig. 9. 



Hyoid of CMamydosaiirus. 

 a, projecting cartilage of hyoid arch. 



Chlamydosaurus is ossified and segmented off from the adjoining 

 bones, with which it articulates by definite joints and is not 

 merely continuous. If it could be shown that this piece does 



* " On the Structure and Development of the Skull in theLacertilia," Phil. Trans. 

 1879, pi. 40. fig. xi. and pi. 42. fig. v. In the latter figure the lettering " ch." 

 points to the thickening. 



