THE PASKAPOO FAUNA 389 



List of Paskapoo Mammalia 

 Multituberculata : 



Menisccessus sp, indesc. 



Ptilodus sp. 



Cimolodon sp. 

 Trituberculata : 



. Didelphops sp. ^ 



? Batodon sp. C ? Marsupialia 



? Thlwodon sp. J 



? Gen. indesc. ^ 



? Gen. indesc. C ? Insectivora 



? Pantolestidse gen. indet. \ 



?Creodonta and Condylarthra 



??Taligrada 



Characters of the Fort Union Fauna, with List 



This fauna as described by Douglass and Gidley consists of a few mam- 

 mals, and Hay has described a single Trionychid chelonian. A consid- 

 erable collection of .mammals from the upper Fort Union will shortly be 

 described by Mr. Gridley; other reptilia are probably present, but have 

 not been described. 



The mammalian fauna corresponds in part to that of the Torrejon. 

 It includes a minor element of Multituberculates, of which Ptilodus is 

 the only described genus, the species closely allied to those of the Torre- 

 jon. A number of Placental genera of the Torrejon are represented, but 

 there are several genera, apparently Placentals, which have no near rela- 

 tives in the typical Paleocene faunae. 



In the following list the mammals are auct. Douglass 1908, but I have 

 added some critical comments based on his figures and descriptions. 



List of Fort TJniqn Vertel)rates 



EEPTILIA 



Order Testudines 



Fam. Trionychidse 



Aspideretes nassau 



MAMMALIA 



Order Multituberculata 

 / Fam. Plagiaulacidae 



Ptilodus montanus (Torrejon stage of evolution) 

 Order ? Marsupialia 



Fam. ? Cimolestidae Marsh 



f Batodon sp. (Not figured; valueless in correlation) 

 ? Ciniolcstcs sp. (Reference very questionable; ? placental) 

 Fam. Didelphyidae 



f Peratherium sp. 



