Some time ago the writer mentioned a new form from the Triassic of Wyoming and briefly described one of the vertebra.' At that time it was hoped that the explorations in the western Trias of the past season would bring to light something further concerning this peculiar form. No additional evidence has so far been disclosed, however, in the collections from Arizona and New Mexico, and it is probably well at this time to describe more fully the remains for the benefit of others who may be engaged in the same field. The material herein described consists of an ilium, several vertebrae from various parts of the column, two femora, a tibia, the proximal end of a fibula, and several innominate fragments. All are considerably crushed and broken. The leg bones are so flattened that it is rather difficult to determine the true proportions. The ilium, as previously pointed out,2 is very similar to that described by J. H. Lees3 as belonging to Paleorhinus Bransoni. The condition of the bone suggests little distortion; still, upon a comparison with the specimen described by Lees, it is evident that the supra-acetabular flange has been somewhat depressed by pressure. To all appearances the acetabulum is formed almost entirely by the ilium. It is broad and deep and closely confined above by the supra-acetabular flange. In preparing the specimen what appears to be a foramen of perhaps 5 mm. in diameter was exposed, running in and slightly upward from the upper acetabular surface. It is barely possible, however, that this is simply a matrix-