1893.] Geology and Paleontology. 659 
ml ‘007: of m2:005. Depth of jaw beneath p3 010. The character of 
the premolars suggest those of Inercytherium, but Parietis was no 
creodont, the molar alveoli clearly showing the presence of one sectorial 
and two tubercular molars, and the whole appearance of the specimen 
is musteline. Of the European genera Stephanodon von Meyer, appears 
to be most like Parietis but differs in many particulars, e. g. in having 
but two lower molars.—W. B. Scorr, Geological Museum, Princeton, 
N. J., May 24, 1893. 
The Mammals of the Deep River Beds.—The Tertiary beds 
of the Deep River, Montana, were discovered by Grinnell and Dana in 
1875. These observers recognized two distinct horizons-in the forma- 
tion, which they called respectively “ Miocene” and “ Pliocene,” with- 
out attempting a more exact correlation. In 1878, Cope referred the 
formation to the base of the Loup Fork, but afterward regarded it as 
a distinet epoch (Ticholeptus beds), intermediate between that forma- 
tion and the John Day. 
The Princeton expedition of 1891 made extensive collections in the 
Deep River Valley, and the examination of these has brought to light 
some interesting new forms, upon which the following preliminary 
notes are founded. A full description, with figures, is in preparation. 
The beds contain, as Grinnell and Dana pointed out, two very dis- 
tinct faunas, the older one of which is equivalent to the John Day, and 
the newer to the “ Ticholeptus beds” of Cope. The lower strata, from 
a few very small exposures, yielded numerous specimens of the follow- 
ing forms: Cynodesmus thooides gen. et. sp. nov.; Steneofiber montanus 
sp. nov.; Canopus sp.; Miohippus annectens? Marsh; M. anceps? 
Marsh ; Mesoreodon chelonyz gen. et. sp. nov. ; M. intermedius sp. nov. ; 
Poébrotherium sp. ; Hypertragulus calcaratus Cope. 
The upper beds, from which alone Professor Cope's collections appear 
to have been obtained, contain a very different fauna. The following 
list is made from a comparison of Professor Cope’s material with that 
gathered by the Princeton party: ? Canis anceps sp. nov.; Chalico- 
therium sp.; Aphelops fossiger Cope; Miohippus sp.; Anchitherium 
equinum sp. nov.; Desmatippus crenidens gen. et sp. nov.; Protohip- 
pus sejunctus Cope; P. (Merychippus) insignis Leidy ; Merychyus zygo- 
maticus Cope; M. pariogonus Cope; Merycocherus montanus Cope; 
Cyelopidius simus Cope; C. emydinus Cope; C. incisivus sp. nov.; 
Pithecistes brevifacies Cope; P. decedens Cope; P. heterodon Cope; 
Protolabis sp. ; Procamelus sp.; Blastomeryx borealis Cope; B. anti- 
lopinus sp. nov.; Mastodon proavus 
~ 
