THE AMERICAN NATURALIST. [VoL. XXXVI. 
The blades of the knives shown in Fig. 1 are attached to their 
handles with gum only. Their bases fit the notches snugly. The 
M Fie. 3 

— Prehistoric 
cement with which they are fastened projects 
slightly beyond the end of the haft and is pressed 
against the blade at either side. The blade of a 
is of black flint; 4 is also of dark flint, and c 
is chipped from gray chalcedony. A suspending 
cord of twisted cotton passes through the handle 
of c. The handle of a is also perforated for the 
passage of a cord. 
The leaf-shaped blade of the knife illustrated 
in Fig. 2, a, is of light-colored chalcedony and is 
inserted for about half its length into the wooden 
handle, being firmly secured with gum. The 
drawing shows both front and side. 
The beautiful knife shown in Fig. 2, 4, has 
a blade of the stemmed variety, chipped from 
pink chalcedony. It is attached to the wooden 
handle with gum only. 
The broken blade of Fig. 2, c, is fastened with 
gum. As an additional security it is wrapped 
with a cord of twisted yucca fiber. The handle is 
perforated for the passage of a suspending cord. 
The unique example illustrated at æ has a blade 
of dark flint secured at an angle to the well-made 
wooden haft. A cord of twisted yucca fiber 
passes through a perforation near the end. 
The implement represented in Fig. 2, e, would 
perhaps be most correctly classed as a saw. The 
blade is of a type widely distributed but nowhere 
common. It is chipped from dark flint. The 
teeth are thin and sharp, and in the hands of a 
skilled prehistoric workman it has doubtless done 
good execution in wood, bone, and antler. The 
handle is a section of a limb or shoot, and the 
double-aded knife blade is secured with 
adi house, - The double-bladed knife E igatested in Fig. 3 has 
for a handle a section of a small sapling or limb, with the bark 


