1915.| Matthew and Granger, Lower Eocene Wasatch and Wind River Faunas. ont 
Sand 
Coulée Gray Bull Lysite Lost Cabin 
bs puiteen ep P ' = z 5 =| = 5 as 
‘yopsodus ce & iS) aes S S cc 
“s “ s | Fe | ae as 
® ~ ome foe 
Se ee ee 
WS ~o 
simplex 18 1 
miticulus ees BA t  ABG 1 “ ae = eel 
lysitensis Bee 0 me 20 32 96 3 Te 
minor oe abe ee i 1 Ps 
wortmani ss 13 Sera ee ve ane 2 14 Be 
~ mentalis = iy cas 5 1 is a a oe OO 27 
browni ia oa ane a5 92 2 1 
powellianus ~ es Rab oe a 4 (114 
walcottianus a oe aes pe, a ie; Ps 3 
(Total) 18 24 451 26 130 214 8 | 84 ane 
The Status of the genus Diacodewis Cope 1882.1 
(Type Phenacodus laticuneus Cope 1882.2) The type species of this 
genus was based upon a specimen, No. 4202, Am. Mus. Coll., consisting of 
three jaw fragments with teeth supposed to belong to one individual. It 
now appears that these three fragments pertained to animals of three 
different orders of mammalia, as follows: 
(a) Upper premolars of Hohippus sp. 
(b) Upper molars of Hyopsodus sp. 
(c) Last lower molar of an Artiodactyl related to Trigonolestes. 
When the Cope collection was acquired by the American Museum this 
type was reéxamined by Professor Osborn and Dr. Wortman, and recog- 
nized as a composite of Kohippus and Hyopsodus. As a result of this 
examination in 1899 the upper premolars were removed from the type by 
Matthew * and the species referred to Hyopsodus. The characters of the. 
upper molars were the substantive basis of this reference, the lower molar 
being recognized as abnormal for Hyopsodus although its true character 
was not suspected. The new collections from the Wasatch beds of the 
1 Amer. Nat., Vol. XVI, p. 1029. 
2 Proc. Am. Phil. Soc., Vol. XX, pp. 179, 181. 
3 Bull. A. M. N. H., Vol. XIT, p. 30. 
