FOSSIL FOOTPRINTS OF THE JURA-TRIAS. 



507 



The type specimens of Fulicopus lyellianus, nos. \ and fi, of the Hitchcock cabinet, 

 are referable to Anomoepns major, bein- identical in form and size with the latter after 

 allowing for such changes as the shifting of the animal's weight from the heel to the 

 whole foot while walking, would make, especially in the posterior pads. The specmien 

 of F Jyellkums on slab no. \ on which the type of A. major is also found, is so similar 

 to the latter as to lead to the belief that they were made by the same individual. This 

 belief is increased bv the occurrence of certain unique markings upon both tracks which 

 are brou-ht out in "the figures. This seems to prove the synonymy of the two species 



Fi» 28 Fulicopus lyelliaaus E. Hitchcock. Restoration of the dinosaur in the attitnde of feedmg^ 

 X ''■ Based upon the footprints figured above (fig. 26). The general contonr and the bones are suggested 

 by Marsh's figured restoration of Hypsilophodon, although the proportions of the limb segments are 

 altered. The lateral digits of manas and pes are omitted for clearness. II., iUum ; Is., ,sch,al bones; 

 Is. C, i-schial callosity ; Pu., pubic bones. 



(compare figures 20 and 27). FnUcopus lyeJUanus as a name should have priority and 

 must be used though the generic name was founded upon a misconception. The other 

 species of the genus, ndicopus giganteus, is referred to Eubrontes under the specific name 

 platypus as there is a giganteHS already in the genus. 



The peculiar heart-shaped impression shown in figure 28 (see also E. Hitchcock, 65, 

 pi I'l) behind and between the heels, already alluded to as that of the ischial callosity, i.s 

 attributed by E. Hitchcock ('58, p. 56) to the end of a truncated tail. The paired ends ot 

 the ischial bones upon which the Orthopoda rested, would come at just about the position 

 indicated by the mark in .luestion, and while the bones themselves could not have 

 made the impression, a callosity such as the sternal callosity seen in the dromedary, is not 

 out of the fiuestion and seems the most likely explanation that can be given. Figure .8 

 attempts to show the animal seated as though drinking and demonstrates this idea. 



In the type specimen of Anomoepus htn-me<n„s, no. ^«, of the Hitchcock cabinet, 



. The possibility of a caliosity being present .as suggested to the author by Mr. Oarles R. Knight, though the concep- 

 tion of the posture together witli the restoration are the writer's own. 



