1890.] Archeology and Ethnology. 591 
straight or convex. This class includes the leaf-shaped argillite imple- 
ments found by Dr. Abbott in the Delaware river gravels at Trenton, 
Sub-class C. Long, thin blades, with nearly straight edges, more 
like a dagger or poignard. The base may be either convex, straight 
or concave. Many of them show traces of attachment to a handle by 
means of bitumen or gum. They are peculiar to the Pacific Slope. 
Triangular.—This class includes all forms approaching a triangle, 
whether the bases or edges be convex, straight or concave. They are 
without stems, and, consequently, without shoulders, but in some speci- 
mens the concavity of the base produces barbs. 
Stemmed.—This class includes all varieties of stems, whether straight, 
pointed or expanding, and all varieties of bases and edges, whether 
convex, straight or concave. 
Sub-class A. Lozenge-shaped 
Sub-class B. Shouldered, but not barbed. 
Sub-class C. Shouldered and barbed. 
Note. Nearly all of these convex bases are smooth, as though they had been worn. 
e purpose or cause of this is unknown. 
Peculiar forms.—These have such peculiarities as distinguish them 
from all other classes, but by reason of their restricted number or local- 
ity can scarcely form a class of themselves. 
Sub-class A. -Beveled edges. The bevel is almost always in one 
direction. 
Sub-class B. Serrated edges. 
Sub-class C. Bifurcated stems. 
New Archzological Discoveries.—These seem to be made in 
every land with about equal frequency. I have wondered if the aver- 
age archzologist (I do not expect it of mere collectors) has ever 
thought of the evidence afforded by the number of these discoveries as 
to the length of time of prehistoric human occupation, or the density 
of the prehistoric population. As mere finds of stone hatchets or 
arrow-heads, spear-heads or knives, bits of pottery, shell, bone, etc., 
these discoveries are regarded by the finders as of value only to the 
amount of money for which the objects can be sold. This value is 
practically nothing compared with what it might be to science if the 
locality, conditions, association of the objects when found, were accu- 
rately noted and truthfully recorded, so as to be used in making up the 
history of prehistoric man. 
