136 The American Geologist. Feb. i89i 
A description and restoration of the skeleton of Aph clops fossigcr. A 
discussion of the homologies of the elements of the molar teeth in 
rhinoceroses. A study of the brain-characters of Mcsohippus and 
Aphelops, including a comparison of the brain-casts of Aphelops, Acera- 
therium and Ceratorhinus, from which the conclusion is drawn that 
"the steady brain-growth of the ungulates during the Eocene and 
early Miocene periods reached its highest point in some families of the 
later Miocene, and was followed by a degeneration." The announce- 
ment of ChaMcotherium from the Loup Fork of Nebraska and the proba- 
ble identification with it of Moropus elatus Marsh, from the Loup Fork 
of Kansas. 
This important contribution to the knowledge of North American 
Tertiary Mammalia is the forerunner of "a memoir upon the Cambridge 
collection of Miocene Mammals, which is now in preparation." 
Classification of the glacial sediments of Maine. George H. Stoxe. 
(Arn. Jour. Sci. Vol. xl, August, 1890. — This paper notes the features 
of the drift in the central and southern portions of Maine, and in par- 
ticular those modifications of the glacial deposits which are due to the 
presence of the waters of the Atlantic ocean when at a higher level 
than the present. 
1. Isolated Karnes, viz., those short ridges so distant from all other 
glacial sediments that if they had any other cotemporary correlative 
sediments they are not known. They are found in all parts of Maine 
except possibly in the extreme north. They are supposed to have been 
formed in channels in the glacier. 
2. Hillside Karnes, found on the south slopes of rather high hills, 
expanding toward the bottom into a plexus of reticulated ridges, of 
coarse sediment above and finer below, as if the depositing river entered 
a body of still water, or in some way lost its carrying power. These 
are found above the level of 230 feet. 
3. Karnes ending in marine deltas. This is shown by the horizontal 
transition of the gravel of the kame first into sand and then into clay 
containing marine fossils. 
4. Karnes ending in lacustrine deltas. These are found only above 
the contour line of 230 feet above sea-level. These exhibit the same 
horizontal sorting of the sediments as the marine deltas (No. 3) but 
they do not contain marine fossils. 
.",. Massive Kame-plains. These are extended gravel plains mostly 
found below 230 feet formed by glacial rivers carrying abundant glacial 
debris and not checked in their course by any large body of open water 
so as to allow of the dropping of their finer sediment. 
6. Discontinuous Kame systems. These are in linear series separated 
by intervals of varying length. These fragments of ridges are sep- 
arated by expanses of unmodified till, and are almost exclusively con- 
fined to the coastal region below 230 feet above the sea. There is, ac- 
cording to Prof. Stone, a general law prevailing: viz., that at about 230 
