Fig. 87.— Tbe Branchial Skeleton of « fish, an I its representative in an 

 Amphibian and in a Bird. 



Hyoid bone of a Urodele Amphib- 

 ian, jlfewopoma: Zb, hyoidparb; Kb, 

 remains of the branchial arches. 

 (From Clans and Sedgwick.) 



Hyoid bone of the Hooded 

 Crow, Corojus Comix. (From 

 Glaus and Sedgwick.) 



