HARRINGTON ] DESCRIPTION OF THE ARTIFACTS 95 
II. TriancuLar [T] 
This division includes all specimens which, according to geometri- 
cal nomenclature, are in the form of a triangle, whether the bases or 
edges be convex, straight or concave. They are without stems and 
consequently without shoulders, though in some of the specimens the 
extreme concavity of the base produces barbs when the arrowshaft 
is attached. 
convex [cx]. 
Base Meee ee. 2 straight | truncate, st]. 
concave [ev]. 
Ill. StemMMeED [S] 
This subdivision includes all varieties of 
straight [parallel edges, p]. 
pointed [contracting, c]. 
Sten = sae See, expanding [e]. 
round [r]. 
flat [f]. 
except those with certain peculiarities and included in Division IV 
| Irregular]; and whether the bases or edges are convex, straight, or 
concave. 
lozenge-shaped, not shouldered or barbed [un- 
shouldered, u; diamond-shaped, rhomboid, d]. 
jo ae but not barbed [shouldered, sh]. 
shouldered and barbed [barbed, b]. 
General shape_-_- 
IV. Pecutrar Forms [IrrREcuLaAR, I] 
This division includes all forms not belonging to the other divi- 
sions, and provides for those having peculiarities, or the specimens 
of which are restricted in number and locality. 
1. Beveled edges. 
2. Serrated edges. 
3. Bifurcated edges. 
4. Long barbs, square at ends. Peculiar to England, Ireland, and 
Georgia, United States. 
5. Triangular in section. 
6. Broadest at cutting end, trenchant transversal. Peculiar to 
western Europe. 
7. Polished slate. 
8. Asymmetric. 
9. Curious forms. 
10. Perforators. 
In our present collection the leaf-shaped points are the most nu- 
merous; then follow the stemmed varieties and a very few triangular 
