OSTEOLOGY OP THE AKMOEED DINOSAUKIA. 



121 



As to the position of these various shaped skin scutes, the present specimen 

 offers but few suggestions^ and anything that can be said regarding them is largely 

 a matter of conjecture, since all were mixed up in somewhat of a disassociated 

 manner and mingled with various other parts of the skeleton. 



Judging from the length of the femur the present dinosaur in life was of low 

 stature, with a height at the 

 hips of about 4 feet, and that 

 it was quadrupedal in gait 

 appears to be indicated by 

 the robust character of such 

 parts of the pectoral girdle 

 and fore limbs as have been 

 preserved. 



DiNosAuu Armor prom the 

 Lance Formation. 



In 1911 Wieland figured ' 

 and described a number of 

 dinosaurian dermal plates 

 from the Lance formation of 

 Wyoming that are now pre- 

 served in the paleontological 

 collections of Yale University. 

 While none of these were so 

 associated with other bones 

 as to be positively identified, 

 they are of interest as show- 

 ing agreat diversity of shapes, 

 and they especially emphasize 

 the paucity of our knowledge 

 concerning the animals to 

 which they belong. Comply- 

 ing with Wieland's suggestion 

 that "it would be of very 

 considerable interest to know 

 the actual number and pro- 

 portion of these elements in 

 the collections, and especially 

 their associations," I have 

 prepared a brief account of 

 those in the United States 

 National Museum, with figures of the more characteristic plates. 



Cat. No. 5793 is the dermal element (fig. 73) figured by Marsh ^ as the dermal 

 spine of Triceratops and of which Hatcher ^ says "may have been arranged in pairs 



' Amer. Joum. Sci., vol. 31, pp. 119-122, flgs. 4-7. 



2 Dinosaurs of North America, 1S96, pi. 70, figs. 1-3. 



3 The Ceratopsia, Mon. 49, U. S. Geol. Survey, 1907, p. 65, figs. 74 1-3. 



