70 COLORADO COLLEGE STUDIES. 



Femur and humerus (as indicated by a Belvidere, Kansas, 

 specimen belouginii: with little doubt to this species) proxi- 

 mally enlarj3;ed so as to form a sort of head, slitchtly deflected, 

 or asymmetrical, but without any distinct neck and trochanter 

 such as are seen in Tvinacromerum hcntonianum,CvKg.\ flat- 

 tened and laterally expanded at the distal extremity, and pro- 

 vided with two distal facets. 



Measurements. — Dorsal vertebra of type-specimen froui 

 the Blue Cut hill: length of centrum 45, height of same 44. 

 height of vertebra to floor of neural canal 46, breadth of cen- 

 trum at either extremity 45 mm. Humerus (or femur) from 

 about one mile south of the Belvidere railway station, pro- 

 visionally referred to the same species: length (minus 

 epiphyses) 167 (as restored 171), girth at point of greatest 

 constriction 120, breadth at same point 41, greatest distal 

 breadth (estimated) about 70. thickness at distal part about 

 35 mm. 



Occurrence, etc. — Remains of Plesiosaurus muclgei are 

 common in the Fredericksburg (Neocomian) shale of Kiowa 

 and Clark county, Kansas. 



My announcement, several years since, of the occurrence 

 of Plesiosaurid remains in the Neocomian of southern Kansas 

 was based upon the discovery of two vertebme of Plesiosaurus 

 in No. 5 of my '" Blue Cut Mound section," one of which 

 vertebr.ie, attached to a specimen of Gryplu^a pitcheri (the 

 vertebra illustrated on Plate I of the present article and con- 

 sti tilting the type of P. mudgei) was turned over to the writer 

 by the collector, Mr. A. L. Diamond. 



A year or two later, I examined a vertebra, then in the 

 possession of Mr. Henry Fares, which agreed closely with the 

 former one and which had been obtained with others in cen- 

 tral Clark county. 



Last autumn, fragmentary remains of what is probably 

 the same species were found by the writer at several points 

 near Belvidere. Kansas, in No. 3 of the •"Belvidere section." 



The best of the last-mentioned remains, a femur or 

 humerus, is figured on Plate I with the type- vertebra, and in- 

 dicates paddles whose size is quite consistent with that of the 

 animal indicated by the Kiowa and Clark county vertebrae. 



