884 The American Naturalist. [November, 
of the uses of nearly every implement may be attributed to 
the prehistoric man as has been done by the civilized man. 
No one can prescribe the limits}within which a sailor’s sheath 
knife may not be used. A hollow-handled awl is sold in our 
stores to-day for 50 cents representing itself to be an entire set 
of tools. The same duplication, changing of purpose and 
Fics. 3, 4. Leaf-shaped implements of jasper, chipped to shape, fastened 
in wooden handles with pitch or bitumen—to be used as knives, from the Pacific 
Coast, half size. 
IG, 5. Leaf-shaped blade, chipped, of mattled absidian, wrapped in other 
skin, used for knife. Collected by Capt. P. A. Ray, from Hoopa Valley, Cal., 
half size, 
adaptation to other purposes, may not have been impossible 
with the prehistoric man in his employment of these leaf- 
shaped implements, but that all the leaf-shaped implements, 
the products of this quarry, and by consequence, all others, 
should have been but prepared material, wrought from the 
pebble, to be carried to the home of the man who made them, 
to be flaked into some unknown and unsuspected implement 
and then peddled over the country, is an assumption which 
