634 Bulletin American Museum of Natural History. [Vol, XIX, 



beds resembling the lower portion of the beds to the west which 

 Cummins identified as probably Goodnight beds. It seems 

 certain, therefore, that the beds to the west are older than 

 the fossil-bearing strata under discussion. This apparent in- 

 consistency in level is due to the heavy erosion of the older 

 beds before the Upper Miocene deposits were laid down. 



The following species have been reported from the Claren- 

 don locality: 

 Reported and Identified by Obtained and Identified by 



Cope. the American Museum 



Expeditions. 

 Aphelops fosstger Cope, 



Protohippus perditis Leidy, Mastodon productus , 



" parvulus Marsh, " sp. 



" fossulatus Cope (sp. Dinocyon gidleyi, 



nov.), " mceandrinus, 



Protohippus mirabilis Leidy', Machcerodus sp., 



" placidus Leidy, Teleoceras sp., 



Hippotherium ^ afflne Leidy, Hipparion 3 lenticularis , 



" occidentale Leidy, " occidentalis , 



Procamelus robustus Leidy, " sp., 



" gracilis Leidy, Protohippus perditis ? 



" leptognathus Cope (sp. " sp., ' 



nov.), Pliohippus ? sp. nov. 



Blastomeryx gemmifer Cope, Procamelus sp., 



Tetrabelodon serridens ? Cope. Pliauchcenia sp. 



Middle or Lower Miocene. 

 Panhandle Beds A 



As to the age of these older beds it is difficult to say, owing 

 to the present lack of palseontologic evidence, just where they 

 should be placed. It is probable, however, that they are 

 Lower or Middle Miocene. 



Some lower teeth of Merycochcsrus and a lower tooth of 

 Procamelus taken from these beds by the writer prove them 

 to be not older than the Lower Miocene. 



Though differing somewhat in detail in the different locali- 

 ties, these older beds in the vicinity of Clarendon, at Mul- 

 berry Canon, at Mount Blanco, and at Tule Canon and Rock 



^Protohippus mirabilis = Merychippus mirabilis. 



* Hippotherium = Neohipparion. ' Hipparion = Neohipparion 



* Local name proposed by the writer. 



