RANA. 349 



cartilaginous nasal capsules and posteriorly with the audi- 

 tory capsules. At the front end of the latter are the prootic 

 bones and on the nasal capsules are the nasals. Qvi the 

 ventral face of the nasal capsules are the vomers. 



In the prepared cartilaginous skull, a large cartilaginous 

 bar (the suborbital bar) can be seen running backwards 

 from the nasal region outside the eyes to meet a similar bar 

 projecting from the auditory region. Here it protrudes out- 

 wards as the quadrate cartilage which bears the mandible. 

 The whole represents the palatoquadrate bar of the skate. 

 In the natural condition it is covered up by a number of 



Fig. 247. — Dorsal View of Entire Frog's Skeleton. 



(Natural Size.) {Ad nat.) 





retacarpals, 





Radio- ^i 

 ulna 





r^\ 



^ 



Phalanges. 





[Pt^ 



ir 



Metatarsals. 



Proximal tarsals. 



