180 ON THE SKULL OF A PARIASAURIAN REPTILE. 
branch of the early reptile stock, any resemblance which it bears 
to them being simply due to convergence. 
I wish to express my thanks to Drs. A. Smith Woodward and 
C. W. Andrews for much help during my work at the Natural 
History Museum, and to Herren Prof. F. Broili in Miinchen and 
Prof. F. v. Huene in Tiibingen, who allowed me to work over the 
fine series of Texas ‘“‘ Permian” vertebrates in the museums of 
their respective Universities. Finally, I have to thank the Percy 
Sladen Trustees, who assisted me to visit South Africa, and 
especially G. Gordon, Esq., the owner of Hottentots Rivier, to 
whose hospitality and interest I owe the specimen of Pariasawrus 
which forms the basis of this paper, and Mr. R. Hall of the 
British Museum, to whose skill and care as a preparator our 
detailed knowledge of Pariasawrus is very largely due. 
