THE 



JOURNAL OF GEOLOGY 



JANUARY-FEBRUARY, iqoj 



THE OSTEOLOGY OF EMBOLOPHORUS DOLLOVIANUS, 

 COPE, WITH AN ATTEMPTED RESTORATION. 



The Pelycosaurian fauna of the Permian beds of Texas has 

 been described from fragmentary material in very large measure, 

 from fragments of the skull, from isolated portions of the verte- 

 bral column, and from separate limb bones ; rarely is any large 

 portion of one animal found preserved. The result has been the 

 almost inevitable description of different portions of the skeleton 

 of forms belonging to the same genus and species under different 

 names. This fact has been very apparent in the attempt to locate 

 the correct taxonomic position of the very complete specimen 

 described below-, but at the same time it has made apparent the 

 compactness and coherence of the family Clepsydropsidae in a 

 most striking manner. 



In the collection of the University of Chicago is a specimen. No. 

 1 14, of a Pelycosaurian in which a very large portion of the skele- 

 ton is represented, warranting an attempt at a description of the 

 complete osteology. The bones were incased in the peculiarly 

 refractory cement of iron and sand which is common on the 

 bones in this locality, and this has rendered the preparation of 

 the skeleton and its study a matter of long time. The specimen 

 was discovered in slightly inclined strata with the head downward 

 and the tail exposed, so the forequarters and skull were well 

 preserved. 

 Vol. XI, No. I. I 



