Surface collecting in 1960 and excavations in 1961 have produced a large sample of chipped obsidian tools from El Inga, a site in Highland Ecuador. From a total surface collection sample of 83 projectile points, 25 complete and 3 nearly complete specimens have been examined intensively. They are described here by precise line drawings and narrative statements about the presence or absence and quantity or quality of morphological and technological attributes within the five attribute systems of material, form, dimension, chipping, and grinding. The three major projectile point styles derived here — “Fell's Cave Stemmed,” “Ayampitin,” and “Paijan” — are interpreted as representing horizon markers in South American preceramic times. The “Fell's Cave Stemmed” style is earliest and shows some technological relationships to the "fluted" points of North America.