Glasfi 4. Reptilid 



429' 



bones are pneuniatio (as in Birds). The Pterodaotyles, whioh occupy among 

 Reptiles a position comparable witli that of Bats among Mammals, were for 

 the most pai-t small animals, and lived in Jurassic and Cretaceous times. 



The Dinosaurians (Binosauvia) are a group of Reptiles consisting of 

 numerous forms, which are of the greatest interest on account of their affording 

 a link between Reptiles and Birds. Within this division there are forms 

 which stand tolerably near to other Reptiles, and again, forms which more closely 

 approach Birds. The Dinosaurians wei-e terrestrial animals, chiefly of consider- 



