Douglass : Merycochcerus. 89 



species of this genus described in the preceding pages. The pre- 

 maxillary in M. proprius is not described." 



Of the seven species enumerated and characterized in Cope's paper 

 above quoted three — "Merycochcerus" macros tegus, "Merycochcerus' ' 

 chelydra, and "Merycochcerus " montanus were described for the first 

 time. The types of Merycochcerus super bus, teidyi, macrostegus and 

 chelydra all came from the John Day beds of Oregon. With little 

 doubt, the first three, and perhaps all, came from Bridge Creek. 

 Merycochcerus montanus was found in the Ticholeptus or Deep River 

 Beds of Montana. 



In 1890 Prof. W. B. Scott 7 described a foot of a Merycoidodont 

 from the Miocene of Nebraska under the name of Merycochcerus 

 coznopus. 



In his Mammalia of the Deep River Beds* (1893) Scott described 

 nearly the entire skeleton of what he supposed to be Merycochcerus 

 montanus. 



While collecting fossils in the Loup Fork horizon in the Lower 

 Madison Valley in Montana (1 894-1 896) Earl Douglass discovered 

 several portions of mandibles of Merycoidodonts. Three of these 

 were remarkable for the depth of the horizontal ramus of the mandible 

 and the shortening and crowding of the premolar series. In one of 

 these afterward named Merycochcerus a/tiramus, 9 the mandible was 

 surprisingly deep, especially at the angle. 



In 1899, in the Flint Creek Beds (Upper Miocene) near New 

 Chicago, Montana, Douglass found a nearly complete skull, including 

 the mandible, of an extremely peculiar Merycoidodont which had a 

 remarkably deep mandible like some of the specimens from the 

 Madison Valley. The most peculiar characters were the extreme 

 shortening of the nasals and several modifications of the skull, making 

 it as clear as the structure of the skull could do, that the animal pos- 

 sessed a large upper lip or proboscis. 



Mr. Douglass described the above specimens in the paper above 

 quoted, 10 under the generic name Merycochcerus. In Part II., p. 82, 

 he says : 



^Beitrage zur Kentniss der Oreodontidw, p. 346, PI. XVI., Figs. ^Z an d 34« 

 *Proc. Am. Philos. Soc, Vol. XXL, p. 15 1. 



9 "New Species of Merycochcerus in Montana," Am. Jour. Set., Vol. XI., part 

 II., Jan., 1901, p. 73. 



'0 Am. Jour. Sa\, Vol. X., pp. 428-438 and Vol. XI., pp. 73-83. 



