MUSEUM OF COMPARATIVE ZOOLOGY. 33 
throughout the town of Richmond occasional boulders of the same rock 
may be observed. Good specimens of boulders of this sort may be seen 
on the southern slope of Mount Osceola, a short distance southeast of 
Squire Bacon’s. 
BUFF LIMESTONE BOULDERS. 
A compact buff limestone, with interlacing fissures on the weathered 
surface, has been referred to (page 23) as lying adjacent to the gray 
limestone just mentioned. The boulders of this rock have a distribu- 
tion similar to that of the gray limestone boulders. One of them, eight 
feet in diameter, is situated upon the crest of the Western Branch of 
the Richmond Range, at the crossing of the principal boulder train, and 
another, six feet in diameter, occurs at a distance of one fourth of a 
mile S. S. W. from the summit of Perry's Peak. The former is 600, 
and the latter 800 feet above any known exposure of the same kind of 
rock in place. 
SUPPOSED LIMESTONE TRAINS. 
It was stated by Sir Charles Lyell and Rev. J. B. Perry that a num- 
ber of limestone trains originated upon the Richmond Range, and ex- 
tended across the Richmond Valley. (See references at beginning of this 
paper.) So far, however, as the observations of the present writer have 
extended, the Richmond Range is made up mainly of mica. schist 
There are, indeed, many rounded blocks of limestone in the Richmond 
Valley, chiefly along the western side, but they are confined to the 
limestone area, and there is no reason for supposing that they have 
been transported any considerable distance ; it is probable, rather, that 
they were derived immediately from the underlying bed-rock, which 
they exactly resemble. They could hardly have originated upon the 
Richmond Range, since its only limestones are the two upon its western 
slope, and neither of them resembles the material of which the blocks in 
question are made up. 
SUMMARY, 
It is evident, from the relation which the present position of the 
chloritic schist boulders bears to their origin, that the transportation of 
glacial material in this region has been in general from the northwest 
towards the southeast. 
Although all three of the ranges exhibit marks of glacial action 
wherever their bed-rocks are exposed, none of them afford trains of 
boulders except the Canaan and Lebanon Range. Fragments of mica 
