THL PERMIAN PERIOD 193 



Amphibians were much like those of the Pennsylvanian, except 

 that some were even larger, new species were added, and even more 

 reptilian features were developed in some. 



Reptiles. — Any possible doubt about the existence of true 

 Reptiles in the Pennsylvanian is completely removed when we 

 consider the abundant reptilian records of the Permian. They 

 developed in a remarkable manner, so that before the close of the 

 period several important subclasses or orders, represented by 

 many individuals, were evolved. Some of the Reptiles already 

 began to show pretty distinct mammalian characteristics. The 

 accompanying figures will give a good idea of two important 

 Permian forms. 



