OSTEOLOGY OF THESCELOSAUKUS, AN ORTHOPODOUS 

 DINOSAUR FROM THE LANCE FORMATION OF 

 WYOMING. 



By Charles W. Gilmore, 



Assistant Curator of Fossil Reptiles, United States National Museum. 



INTRODUCTION. 



Since the preliminary description ^ of Thescelosaurus neglectus was 

 published the preparation of the type-specimen has been completed 

 and it is now proposed to give a more detailed account of the skeletal 

 anatomy, and a fuller discussion of its affinities and relationships than 

 was possible at the time of publishing the original article. 



The finding in the United States National Museum collections of 

 the portions of three individuals in addition to the type-specimens 

 serves as excellent supplimentary material and enables me to describe 

 more accurately certain parts of the skeleton that were either missing 

 or badly damaged in the typical specimens. 



OSTEOLOGY OF THESCELOSAURUS. 



SUMMARY OF KNOWN MATERIAL. 



Type, No. 7757, U.S.N.M. An articulated skeleton, lacking the 

 skull and neck, and portions of humeri, scapulae, and coracoids. From 

 Doegie Creek, Niobrara County,^ Wyoming. Collected by J. B. 

 Hatcher and W. H. Utterback, 1891. 



Paratype, No. 7758, U.S.N.M. Consists of a few cervical, dorsal, 

 and caudal vertebrae, portions of both scapulae, ribs, portions of fore 

 and hind feet, and fragmentary limb bones. From Lance Creek, 

 Niobrara County, Wyoming. Collected by O. A. Peterson, 1889. 



No. 7760, U.S.N.M. Left scapula and coracoid. From Deer Ears 

 Buttes, Butte County, South Dakota. Collected by J. B. Hatcher, 

 1891. 



No. 7761, U.S.N.M. Cervical centrum. From "Beecher's Quarry," 

 Niobrara County, Wyoming. Collected by Hatcher, SuUins, and 

 BurreU, 1891. 



1 Gilmore, Charles W., A new Dinosaur from the Lance Formation of Wyoming. Smith. Misc. Coll., 

 vol. 61, No. 5, 1913, pp. 1-5, figs. 1-5. 



2 At the time these collections were made, Niobrara Coimty was a part of Converse Comity. 



Proceedings U. S. National Museum, Vol. 49— No. 2127. 



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