

xii PHYLUM CHORDATA 411 



hyoid is a squarish plate of cartilage (b. hy.) with two pairs of 

 processes (a. c. hy.,p. c. hy.\ the posterior of which is ossified. 



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The scapula is ossified, and is connected by its dorsal 

 edge with a supra-scapula (Fig. 231, S SCP) formed partly 

 of bone partly of calcified cartilage, and developed from 



