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76 • r• 1 • Pro~ectile ints: lateral notch, base same width as blade, T e VB. Three specimens Fig. 7z, aa, bb . Description: lateral notches that intersect the blade margin close to the basal margin. They are shallow, parallel-sided to slightly divergent, have a flat base, their outline is indeterminant, and they are pressure flaked. Materials: chert and quartzite. Size range: length is unknown; width, 11-14 mm.; and thickness, 2-5 mm. Correlations with other sites: Yuma County sites (Gebhard 1949:138, Fig. 47c), and Danger Cave (Jennings 1957, Fig. llq). Projectile points: lateral notch, base na One specimen Fig. 7x . ode. TbDe VC. Description: long, leaf-shaped outline, with a wide but very shallow lateral notch placed close to the base. The blade is lightly serrated with pressure flaking on one face, and only slight modification on the opposite face. Material: chert. Size range: length, 44 mm.; width, 16 mm,; and thickness, 3 mm. Correlations with other sites: similar to a basal fragment (Irwin and Irwin 1959:28, Fig. 20, Type F; Irwin Williams and Irwin, 19661, Projectile points: summary. The projectile points described above have a wide distribution within the survey area. Certain types with more members, such as projectile points with an expanding stem narrower than the blade and sharp and oblique tangs, are equally distributed between the western and eastern leases, as well as between camp and lithic sites. Therefore, no locational patterning was encountered, and there was no significant pattern relative to site type. Again a large sample would aid in determining spatial distribution of types. Temporally, the types represented provide somewhat more information than spatial distribution. Since all specimens were surface finds, pro- venience is somewhat uncertain. Some degree of disturbance might have occurred, leaving the materials on the present surface in the manner in which they were located. The possibility of aboriginal reuse of earlier types also needs to be considered in the chronological ordering of the collection. The presence of early types, however, does indicate that some kind of human activity took place in the area during the periods in question. On the basis of comparable materials from other dated sites, we can be fairly certain that the Williams Fork Mountain area was inhabited, or at least utilized since roughly 5000 BC. The collection contains four projectiles which exhibit characteristics that fall into Mulloy's (1958:161) trait list for the Early Middle Prehistoric Period. These include leaf-shaped projectiles with concave bases, and leaf-shaped pro- jectiles with large basalar constructions and concave bases. The col- lection also includes two projectiles which fall within the Hanna type, straight to slightly expanding stem, leaf-shaped blade, with a basal concavity. A third type is leaf-shaped, unstemmed, with a concave