332 



Notice of New Dinosauria. 



described by Hitchcock. Both apparently belong to the same 

 genus, which the writer has called Anchisaurics, as the name 

 first given was preoccupied. 



The present specimen is part of a skeleton which was proba- 

 bly complete, and in position, when discovered, but for want 

 of proper appreciation at the time, only the posterior portion 

 was secured. This consists of the nearly entire pelvic arch, 

 with both hind limbs essentially complete, and in position. 

 As this was one of the animals that are supposed to have made 

 the footprints, one of the hind feet is figured below. 



Fig. l. 



Figure 1 . — Right hind foot of A?ichisaurus major, Marsh ; front view. One-fourth 

 natural size. 



In the present specimen there are only three sacral vertebrae. 

 All the dorsal vertebrae preserved have their articular ends 

 biconcave, or nearly plane. 



The ilium has a slender preacetabular process, thus differing 

 from most of the other Theropoda. The ischia are very 

 slender, and are directed backward. For the posterior half 

 of their length, they are closely adapted to each other. 



The known remains of this species indicate an animal about 

 six or eight feet in length. 



