A NEW DINOSAUR FROM THE LANCE FORMATION OF 



WYOMING 



By CHARLES W. GILMORE 



ASSISTANT CURATOR OF FOSSIL RF.PTILES, U. S. NATIONAL MUSEUM 



INTRODUCTION 



In July, 189 1, Messrs. J. B. Hatcher and W. H. Utterback dis- 

 covered in Wyoming an articulated skeleton of a small Orthopodous 

 dinosaur. Until quite recently this specimen had remained in the 

 original packing boxes and it was in the nature of a surprise upon 

 first examination to discover that it represented an undescribed form. 

 I therefore propose to make this animal the type of the new genus, 

 Thescelosaurus. The present paper may be considered preliminary, 

 as upon the completion of the preparatory work now in progress a 

 more detailed account of the skeletal anatomy, and a discussion of its 

 affinities, will be given. 



THESCELOSAURUS, new genus 



In the present communication the characters of this genus are 

 included in the description that follows of Thescelosaurus neglcctus, 

 the type species. 



THESCELOSAURUS NEGLECTUS, new species 



Type. — Cat. No. 7757, U. S. N. M. This specimen consists of a 

 nearly complete articulated skeleton, the skull and neck being the 

 only important parts missing. 



Type-locality. — Doegie Creek, Converse County, Wyoming. 



Paratype. — Cat. No. 7758, U. S. N. M. A second individual con- 

 sisting of a few cervical, dorsal, and caudal vertebrae, portions of 

 both scapulae, ribs, bones of fore and hind feet, and portions of limb 

 bones. Collected by Mr. O. A. Peterson, 1889. 



Locality. — Lance Creek, Converse County, Wyoming. 



Horizon. — Both specimens from the Lance formation, Upper Creta- 

 ceous or Lower Tertiary. 



Description. — The vertebral column is present from the anterior 

 dorsal region to the tip of the tail. The centra of the median dorsals 



Smithsonian Miscellaneous Collections, Vol. 61, No. 5 



