FOSSIL FOOTPRINTS OF THE JURA-TRIAS. 



511 



Length of digit II, :2W) in.; of III, .200 nu; of IV, .285 m. Distance between lateral 

 claws, .225 m. Length of foot, .370 m. Length of step, 1.090 to 1.170 m. 



This form is the largest of the genus and with the possible exception of Otozonm 

 vioodil and Gigandipus caudatus, the largest of all the Connecticut valley dinosaurs. 

 The track would indicate an animal eighteen to twenty feet in length and of massive 

 l)uild. Its occurrence is among the most frequent and it has been reported from Massa- 

 chusetts, Connecticut, and New Jersey. 



The type is no. %% of the Hitchcock cabinet, locality unrecorded. The figure (fig. 

 31) is drawn from no. ^ of the same collection. 



Fig. 31. Eiibrontes giganteus E. Hitchcock. 

 Impres.sion of the right pe-s, with the sl?;eleton of 

 the foot restored. X \. From no. Y, of the 

 Hitchcock cabinet. 



Fig. 32. Euhvimtes approximatus (C. H. Hitch- 

 cock). Imprint of the left pes. X \. From no. ?f, 

 of the Hitchcock cabinet. 



Eubrontes approximatus (C. H. Hitchcock). 

 Brontozomn approximatum C. H. Hitchcock, in E. Hitchcock, '65, p. 23, pi. 10, fig. 2. 



Specific characters. Divarication of digits H and III, 15° to 30° ; of 111 and IV, 13° 

 to 24°. Length of digit II, .192 to .153 m.; of III, .274 to .230 m.; of IV, .308 to .295 m. 

 Length of foot, .408 to .381 m. Length of step from no. f, .910 to l.OSO m. In the 



