Nodosaurus textilis Marsh. 117 



very distinct in all specimens known to me. The surface 

 of the tibial shaft is less characteristic than that of the 

 femur, and in this regard is more Stegosaurus-like. 

 "Whether the calcaneum was present or not I can not be 

 sure, but a detached concavo-convex bone may repre- 

 sent it. 



Fibula (pi. IV, ^g. 5; text fig. 6). — The proximal end 

 of the fibula is present, as indicated in the figures, but 

 while held in position by the matrix, it had evidently 

 shifted somewhat downward. The impression of the 

 distal end is also preserved in the matrix, but is quite 

 evidently out of position, having shifted inward upon the 

 face of the tibia away from the regular fibula facet, which 

 is a clearly defined flattened area. The fibula seems to 

 have been relatively more robust than in Stegosaurus, 

 especially in its antero-posteriorly expanded proximal 

 end. 



Measurements of Limh Bones. 



12 3 4 



mm. mm. mm. mm. 

 Pemur : 



Length 975 1080 1200 495 



Max. breadth, prox. end. . 266 283 329 190 



Max. breadth, dist. end. . 251 276 263 170 



Min. width, shaft 114 145 147 65 



Average ratio 



Tibia: 



Length 630 643 696 



Max. mdth, prox. end .. . 247 265 275 



Max. v.-idth, dist. end 238 245 



Min. diam., shaft 79 85 98 



Average ratio 



liatio, fern.: tib., length 1.548 1.679 1.724 



1 = Stegosaurus stenops, Y. P. M. 1856. Femur and tibia may represent 



different individuals. 



2 — ^. stenops, U. S. N. M. 4934, right. 

 ?> — S. wigulatus, U. S. N. M. 6646. 



4 = Eoplitosaurus marsM, U. S. N. M. 4752. 



5 — Nodosaurus, Y. P. M. 1815. 

 * Estimated. 



Pes (fig. 7). — A partially complete left hind foot has 

 l3een assembled from the material pertaining to this 

 specimen and proves to be strikingly suggestive of that 

 of Monoclonius (Brown 1917, pi. 12, E. G.). There are 

 four w^ell developed digits, digit I, while shorter, being 

 fully as robust as the others. The proximal surface of 

 metatarsal II is concave, that of the others convex. 





Ratios 



5 



Cols. 



mm. 



lands 



593 



1.644 



180 



1.477 



230* 



1.091 



93 



1.225 





1.357 



454 



1.385 



182 



1.356 



182 



1.307 



61 



1.295 





1.333 



.306 



1.184 



