820 The American Geologist. May, i5v.7 
orable occurrences of the same nature, within recent years, 
were the great laiulslides oj" sound blull's at Duwainish head, 
West S;^HttIe, (Sept. 1894), b^^ vvfiich. several acres were lost 
to that village ; and still more recently the disastrous slide 
which took place below tide, in the niglit of Dec. 6, 1894, on 
the water front of the city of Tacoma. 
The average breadth of the drift mass oi the Puget sound 
basin as above described, may be taken at about fifty miles. 
Tongues of drift project eastward into glacial valleys, beyond 
the general limit. South Prairie is not far from the centre of 
a marked projection of tl.iis kind. Eroded channels are tilled 
with drift at Wilkeson (1600 feet), where it stands 300 feet' 
above the basal formation. Its occurrence at an elevation of 
2,000 feet near Natchez [)ass has been noted by Willis. 
It is, of course, impracticable to determine the derivation 
of material going to make up the drift mass to the point of 
discrimination between sub-glacial accumulations from a 
great glacier occupying the axial part of the sound basin, 
and re-di^tribution of morainal material from local lateral 
glaciers referable to another epoch of the Glacial period. 
As I am informed by Kev. Myron Ells, the well-known 
ethnologist, of Union City, Mason Co., Wash., tusks with con- 
necting jaws and a tooth, probably of an JiJIej)hos, were ob- 
tained by him several years ago at a depth of some 50 feet, in 
h blutf, 90 feet in hight, at port William near point Dungeness, 
from a gravel bed interposed between heavy strata of clay. 
Other specimens were recovered from the same bluff at a depth 
of 82 feet. These are still in the collector's possession. Bones 
previously discovered were placed in the Smithsonian Institu- 
tion.* By the same authority it is stated that nearly a com- 
plete skeleton from the drift of Whidbey island was sent to 
Washington. f Point-no-point is also mentioned as another lo- 
cality where have been found bones of the same order of mam- 
mals. 
The rocky islands of the San Juan archipelago to the north 
of Puget sound, together with neighboring islands in the 
strait of Georgia, on both sides of that group, and also numer- 
*The Clallam Indian name for the locality, Stsaiim, according to Mr. 
Ells, signifies hones. 
|Tusks 2% feet by 6 inches, were found by Mr. G. O. Lovejoy (July 
1, 1895), on the north side of Penn's cove. 
