XIX. ELOSAURUS PARVUS ; A NEW GENUS AND SPECIES 

 OF THE SAUROPODA. 



By O. a. Peterson and C. W. Giemore. 



Associated with the large Brontosaur skeleton ^ (No. 5 63 )'^ discovered 

 last summer by the Paleontological Expedition of this museum operating 

 from "Camp Carnegie," on Sheep Creek, Albany Co., Wyo., there 

 was found the remains of a diminutive dinosaur hitherto unknown to 

 science. 



Through the kindness of Mr. J. B. Hatcher, Curator of the Depart- 

 ment of Vertebrate Paleontology, the material has been placed in the 

 hands of the writers for study and description. 



The bones were found scattered over an area of some ten to fifteen 

 feet square and as is the case with all disarticulated skeletons the asso- 

 ciation of parts is somewhat conjectural. In this instance, however, 

 the association of this small dinosaur with the remains of the larger 

 individual, together with the particularly well preserved condition of 

 the small bones makes it reasonably certain that they pertain to one 

 animal. Moreover in the present instance doubtful bones have been 

 excluded. 



In the present paper a systematic description will be given of the 

 material at hand and an attempt made to compare the most important 

 characters with the better known members of this order. 



The illustrations are from photographs by Mr. A. S. Coggeshall and 

 drawings by Mr. Sidney Prentice. 



We take this occasion to thank Mr. Hatcher for valuable suggestions 

 and criticisms made in the preparation of this paper ; Mr. F. A. Lucas 

 for material loaned for comparison, and Prof. W. C. Knight for the 

 use of literature. 



'See Science, N. S., Vol. XIV, Dec. 27, 1901, p. 1015. 



2 The numbers enclosed in jjrackets refer to the Card Catalogue of Fossil Verte- 

 brates in the collection of the Carnegie Museum. 



490 



