NATURAL SCIENCES OF PHILADELPHIA. 241 



referred to a huge pachyderm with the name of Uintatherium 

 robustum. Of this animal Drs. Carter and Corson found together 

 a number of parts of the same skeleton, consisting of the back 

 portion of a cranium retaining parts of both temporal fossae, the 

 occiput and the occipital condyles; parts of the upper and lower 

 jaws containing the back molars ; a mutilated humerus ; a proximal 

 and a distal extremity of a femur ; and a calcaneum and an astra- 

 galus. These were found 10 miles from Dry Creek Canon, about 

 50 miles from Fort Bridger. In Dry Creek Canon Prof. Leidy 

 found a mutilated atlas and the body of an axis, evidently of the 

 same animal. 



Ten miles distant from the locality in which the former remains of 

 Uintatherium were found, Dr. Corson discovered the large canines, 

 originally referred to Uintamastix atrox. While it was suspected 

 that they might pertain to Uintatherium, no evidence was found 

 to sustain the opinion, and from their resemblance to the canines 

 of the great Brazilian sabre-toothed tiger Machairodus, they were 

 referred to a carnivore with the name just stated. 



Prof. Marsh has since published a notice, dated Sept. 27th and 

 appearing in the October number of the Amei - iean Journal of 

 Science, of a skull from Wyoming, under the name of Dinoceras 

 mirabilis, which appears to be the same as Uintatherium robustum. 

 The skull he observes is entire and is 28^ inches long. It is pro- 

 vided with three pairs of horn cores and huge decurved canine 

 tusks. The top of the skull is deeply concave and has around its 

 lateral and posterior margins an enormous crest. This description 

 will apply to our cranium, as does also that of the molar teeth to 

 those in our upper jaw specimens. The description of the canines 

 equally well applies to those referred to Uintamastix atrox, so 

 that it would appear that this and Dinoceras mirabilis are the 

 same as Uintatherium robustum. 



Some of the fossils belong to Pal^osyops major, a large tapir- 

 like animal. Of this we have a number of fine specimens, including 

 a cranium, the face and parts of the jaws of a second individual, 

 and several rami of lower jaws with well preserved teeth of others. 

 These were discovered by Drs. Carter and Corson in Dry Creek 

 Canon. The genus was originally noticed in the Proceedings of 

 this Academy for 1870. It was founded on a few teeth and was 

 supposed to be an even-toed pachyderm. From more complete 

 material its true position as an odd-toed pachyderm was recog- 

 nized, and its characters more fully given in Prof. Hayden's Pre- 

 liminary Report of the U. S. Geological Survey of Montana, etc., 

 published in the beginning of this year. The last August, Prof. 

 Marsh published a notice, in the American Journal of Science, 

 of some fossils from Wyoming which he ascribes to two genera 

 under the name of Palasosyops and Limnohyus. From the notice 

 it would appear he has overlooked the description of Palseosyops 

 in the Report just named, fpr he intimates the reference of the 

 genus to the perissodactyls as if previously unknown and sug- 



