GEOLOGICAL AGE OF PEIXCE EDWARD ISLAND. — WATSON. 149 



of the Pelycosanrs, siicli as occur in the Texas region, probably 

 a Demetrordon or l^ausanrus, "characteristic of, and not sur- 

 viving the permian age." 



Simultaneously, and independently, Dr. Von Huehne pub- 

 lished a paper (N. Jahrh. f. M. G. u. P. Beilage, band xx., 

 p. 343) in which he arrived at the same conclusion as to the 

 nature of the fossil and the age of the beds in which it was 

 found. In his "Kevision of The Pelycosauria," published by 

 the Carnegie Institution of Washing-ton (1907), Mr. Case 

 restates his conviction that the animal was a dinosaur 

 characteristic of the Trias, but one of the Pelycosauria, "a 

 highly specialized, primitive side branch of the Ehvncocephalia, 

 which seemingly became extinct at the end of the Permian 

 age." 



Thus, as the existence of Triassic deposits in the northern 

 and central parts of Prince Edward Island depends, even 

 according to the enthusiastic champion of the theory, Prancis 

 Bain, entirely upon the supposition that Batliygnaihus horealis, 

 Leidy, was a dinosaur, and, as the animal has been adjudged a 

 pelycosaur of Permian time by indisputable authorities, the 

 conclusion is inevitable that, in the present state of our know- 

 ledge, Triassic deposits cannot be said to occur in this region. 

 and that the whole rock system of the island is referable to 

 the Permo-Carboniferous age. 



