TARR AND WOODWORTH: CHANGES OF LEVEL AT CAPE ANN. 189 
ber of places, but evidence of this kind is of little value; and each time 
that I have locked where they were once found, it has been discovered 
that they no longer occurred there. > 
Summary. — While a single one of the evidences set forth in this 
paper might not be considered proof of depression of Cape Ann in post- 
glacial times, the accumulation of evidence from several directions is 
such as to make the conclusion necessary that this part of the coast has 
been depressed to a level at least 40 to 60 feet lower than the present. 
Summarizing this evidence, it may be said to consist first and most prom- 
inently of a number of well-defined beaches at a level of from 35 to 60 
feet. At about the same elevation, over most of the Cape, stratified 
drift is found wherever cuts are made, and some of this is evidently 
delta deposit. While much of the stratified material cannot be posi- 
tively associated with wave action, or with the action of streams at pres- 
ent existing, its occurrence below a certain level, while above that level 
there is much unstratified drift, and almost no stratified material, is sugges- 
tive. That these deposits do not more frequently assume the forms of 
the present coastal deposits is readily understood when we consider the 
brief duration of the lower stand of the land in comparison with the pres- 
ent long stand. 
The extinct sand dunes of the Lanesville region, occurring where there 
is now no apparent supply of sand, and long since having ceased form- 
ing, is also suggestive of a lower stand of the land, especially since well- 
rounded pebbles are found beneath this sand in some places. 
Interglacial (?) Beds. —1n 1866 Professor Shaler announced ! the dis- 
covery of fossils from a deposit of stratified drift on Cape Ann not far 
from the Pavilion beach. His list of fossils is as follows : — 
“Lepa. Two specimens. 
MopIoLa DISCREPANS Say. Several specimens. 
Mya TruNCATA Linn. ?, Several specimens. 
MESODESMA ARCTATA ?. Very doubtful. 
NUCULA SAPOTILLA?. 
PANOPEA ARCTICA Gould?. 
SAXICAVA DISTORTA Say. 
Five or six specimens of Lamellibranchiata not identified. 
Crustacean remains, plentiful but very fragmentary.” 
While engaged on the work at Cape Ann with Professor Shaler, both 
he and I tried to rediscover this locality, but without success. In 1897, 
1 Proceedings Boston Soc. Nat. Hist., 1866, Vol. IL, pp. 27-80. 
