1894.] Geology and Paleontology. 1027 
the southern margin than under its central portion, with high lands 
on the upper border from which abundant débris is derived. 
There has been a recent advance and subsequent retreat of the 
glacier on its eastern margin. During its advance it probably extend- 
ed to the ocean. There are several indications that the coast in the 
vieinity has been rising and that the process is still continuing. 
Plistocene Problems in Missouri.—The three hypotheses as 
to the origin of the Boulder Drift and Loamy Clay in Missouri, north 
of the Missouri River, are briefly styled by J. E. Todd, the subglacial, 
the lacustrine and the fluviatile. The objection to the first is the great 
difference in altitude of the drift in Missouri and that in Illinois not 
fifty miles away, together with the absence of drift over Saint Louis 
County and down the valley of the Meramee, and also the apparent 
impossibility of the land ice reaching central Missouri without over- 
flowing the Wisconsin driftless area. To the second and third hypoth- 
eses are opposed the nature of the deposits and the great width and 
depth of the troughs of the Missouri and the Mississippi Rivers. Todd 
confines himself to stating the problems without advancing any theory 
of explanation. Further research, he thinks, may remove the objec- 
tions he finds in the last two and it is not improbable that the deposits 
may be accounted for by acombination of the lacustrine and fluviatile 
theories. (Bull. Geol. Soc. Am., Vol. 5, 1894). 
Wortman on the Creodont Patriofelis.—Dr. J. L. Wortman 
has published, in the Bulletin of the Amer. Museum Nat. History of 
New York, a study of a remarkably perfect skeleton of the Patriofelis 
ferox Minh, which he found in the Bridger beds of S. W. Wyoming. 
The species was described by Marsh under the name Limnofelis feroz. 
Limnofelis Marsh is shown, by the material described, to be synony- 
mous with Patriofelis Leidy of earlier date, and Protopsalis Cope of 
later date turns out to have been founded on a species of the same 
genus. Wortman remarks of the genus: “ The larger species, P. feroz, 
is one of the largest Credonts known, and equalled in size a full-grown 
black bear. The head was disproportionately large and massive, al- 
most equalling in this respect an adult lion. The smaller species, P. 
ulta Leidy, was almost one-third smaller. In both there were a long 
and powerful tail, and broad plantigrade feet, which, together with 
other characters presently to be considered, lead to the conclusion that. 
they were aquatic in habit.” 
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