200 



THE FROG. 



myotomes, and very probably correspond to the ribs of other 

 Vertebrates. 



The urostyle is the hindmost part of the axial skeleton, which 



-^r--- "=-' 



Q; bC pg = >.C^ 



~ i- .S tfe-s- Srdi 



does not become segmented into vertebrae. The cartilage of the 

 urostyle forms a continuous tube in front, surrounding the noto- 



