WEALDEN FORMATIONS. 15 



The oblique plane, posterior position, small size, and exclusively pterygoid formation 

 of the palatonares, together with the procoelian vertebrae, lead one to think of the 

 contemporary coming in, with the neozoic crocodiles, of active, warm-blooded, air- 

 breathing mammals. 



But the considerations suggested by such correlations require the wholesome sifting 

 of discussion ; and I, therefore, propose to reserve them for a communication to the 

 Geological Society of London. 



I will only add that any additional evidences of the cranial characters of Purbeck 

 Crocodiles will be gratefully received. 



