ACADEMY OP SCIENCES.] PUBLISHED RESULTS. 135 



acknowledges, as the best that we have, those broader groupings of such men as Osborn, whose 

 work he was inclined to criticize most emphatically when it first appeared 15 years before. 



Williston laid a broad and fundamental foundation for the fabric of our knowledge con- 

 cerning the cold-blooded air-breathers, building solidly and securely much of the superstructure 

 as well. It is doubtful whether later students of the reptiles particularly will find much that is 

 amiss, especially when the last work of the master shall have been published posthumously. 

 On the other hand, it is the writer's belief that they can build thereon fearlessly, knowing that 

 that which has been done is secure. 



