49 



DINOSAURIA. 



DEYPTOSAURID^. 



Deinodon, Leidy. 



Deinodon hoeridus, Leidy 



Beinodon horridus, Leidy. 1856. Proc. Acfid. Nat. Sci. Philadel, vol. viii, p. 72. 



" " Leidy. 1860. Trans. Amer. Piiilos. Soc. Extinct Vertebrata from the Judith 



River and Great Lignite forroations of Nebraska, p. 143, pi. 9. 



A number of megalosauroid teeth, the largest of whicli measures 90 mm. on its 

 convex curve, are referred to this species. The general shape of the teeth and the 

 serrations agree closely v\'ith some of Leidy's figured types, viz., those shovpu in figures 

 21 to 32 of plate 9 of the above quoted work. 



A few phalanges (including terminal ones) and a metatarsal with fragments of 

 others, are probably also referable to this species. 



Belly Eiver series, Red Deer river, 1897, 1898, 1901. 



That Leidy was correct, in supposing that the teeth to which he gave the name 

 Deinodon, belonged to a single animal, is most probable, in view of our present know- 

 ledge of the teeth of carnivorous dinosaurs. The teeth of Deinodon were evidently 

 slightly heterodont, those used, at a later date, for the foundation of the genus Atiblysodon 

 being probably the anterior teeth of Deinodon. 



Dr. 0. P. Hay has recently pointed out (American G-eologist, 1899, vol. xxiv, p. 346) 

 that the name Deinodon, as originally spelt, is not "preoccupied. This name, as a generic 

 term is here retained and the name Aubli/sodon is regarded as a nomen nudum. 



Deinodon explanatus, Cope, (sp.) 



Plate XV, figs. 11 and 12. 



Lcelaps explanatus, Cope. 1876. Proc. Acad. Nat. Sci. Philadel., vol. xxviii, p. 249. 



A small tooth agreeing with Cope's description. The posterior concave edge is 

 minutely denticulated throughout its length. The convex edge, in its apical half, is 

 still more minutely serrate. One side is almost flat, the other gently convex. 



Meas'>i,remetifs. 



M. 



Length from centre of base to apex 012 



C antero-posterior • 006 



Diameter at base < ^ „„„ 



transverse ■ 003 



