348 EDWARD W. BERRY 
These results agree with those arrived at by Pugh’ from a study of the 
Mollusca from the Pleistocene of South Carolina. Additional facts 
pointing to the same general conclusion are the former northward 
extension of Taxodium, and the occurrence of Planera aquatica in 
the Pleistocene of Maryland. That these floras did not flourish in 
mild interglacial periods is indicated by their association in Mary- 
land with ice-borne bowlders of considerable size, the origin of some 
of which has been traced, the direction of movement discrediting 
forces other than those of ice-action. A further fact is the occurrence 
of several of these species in the West Virginia glacial terraces. Some 
of these terraces contain remains of the musk-ox and other pro- 
nounced boreal types, and are undoubtedly of glacial origin. ‘Those 
with fossil plants are not so satisfactory, as they contain few species 
of northern affinities, and might be taken to illustrate interglacial 
conditions, although they do not indicate as mild a climate as do the 
fossiliferous interglacial beds in the valley of the Don, near Toronto, 
Canada. ‘These considerations somewhat weaken their evidence in 
this connection. They are here denominated as ‘‘glacial,” following 
the original description by I. C. White and Knowlton, with the 
reservation that close stratigraphical studies may subsequently show 
that the plant-bearing terraces differ in age from those with boreal 
animal remzins, as the contained flora in a measure indicates, although 
not altogether inconsistent with the published view of their glacial 
age. 
To be sure, the North Carolina deposits were many miles south of 
the terminal moraine, and the local ice which may have been developed, 
while it proved equal to the task of transporting bowlders, did not 
exercise any considerable effect upon the temperatures of the low- 
lands. Cobb has suggested? that the cobbles found along the ‘“‘banks”’ . 
of the Carolina coast were transported by icebergs from New England 
during periods of maximum glaciation and are not of local origin. 
By implication this theory might include all the erratics in the marine 
Pleistocene of the southern coastal plain. Such a conclusion seems, 
however, extremely improbable. 
1G. T. Pugh, Pleistocene Deposits of South Carolina, Thesis, Vanderbilt Univer- 
sity, 1905. 
2. C. Cobb, Journal of Elisha Mitchell Society, Vol. XXII (1906), p. 18. 
