OSTEOLOGY OF E. DOLLOVIANUS, COPE 3 



a striking degree, since the intercentrum possesses on each side a short process 

 with a concave articular facet for the head of the ribs. From the slio-ht corre- 

 sponding contact with the intercentrum seen in Dimetrodon and the other 

 genera, there can be little doubt that this is the true homology of the ribs in 

 the Theromorpha. 



These remarks were accompanied by a figure of the vertebra 

 of Embolophorus, but no name was given to the new genus. 



In 1886,' the name E. dolloviaiius is proposed for this last 

 species without further description. 



In 1890,^ Lydekker lists this genus as present in the collections 

 of the British Museum and presents figures of dorsal vertebrae. 

 The specific name is respelled as dolloverianus. 



From a careful comparison of the type material now preserved 

 in the American Museum of Natural History in New York city, 

 it seems to me that there is little doubt that the species E. dol- 

 loviajius is very much closer to the genus Di7netrodo7i than to the 

 type of Embolophorus, and that it must eventually be placed there 

 where the material is better known. 



The specimen described below is nearly anatomically com- 

 plete, the only parts lacking being the ribs, the posterior foot, 

 and the ends of the dorsal spines, with, probably, a few dorsal 

 vertebrae. The right side of the skull is nearly perfect as far 

 back as the posterior edge of the orbit, and the bones are pre- 

 served in their natural relations ; the weak temporal arches are 

 destroyed, but the articular portion of the suspensorium with the 

 faces for the lower jaw attachment are preserved. The basi- 

 cranium is separate, as in most specimens of the Pelycosatiria, but 

 both this and the greater part of the lower jaws are preserved. 

 The bones of the palatal region are badly disturbed and flattened 

 against the inner side of those of the facial region, so that their 

 position cannot be made out further than that they were much 

 as in the specimen of Dimetrodon previously described by the 

 author (i). The bones of the shoulder girdle, the clavicles, and 

 the inter-clavicle, a complete fore-limb with the fore foot, of the 



"'Systematic Catalogue of Species of Vertebrata Found in the Beds of the Per- 

 mian Epoch in North America, with Notes and Descriptions," ibid.. Vol. XVI. 



^" Catalogue of the Fossil Reptilia and Amphibia in the British Museum, Part IV, 

 pp. 109, 1 10. 



