In the neighborhood of Stockton, California, are many small mounds and prehistoric sites. Professor James A. Barr and the late Rev. H. C. Meredith spent considerable time in examination. As a result numerous peculiar curved and angular obsidian artifacts were discovered. I present a few views of these in Figs. 150 and 151. In “Prehistoric Implements,” page 362, Professor Barr expresses his opinion that the curves were used to scarify the flesh on ceremonial occasions. This was a universal custom among Indians, particularly the tribes west of the Mississippi and along the Pacific Coast. [Illustration: FIG. 154. (S. 1–2.) This cut presents peculiar serrated unknown forms from the Fraser River, British Columbia. These were found by Harlan I. Smith. ] The peculiar thing is that these curves are confined to the locality of Stockton and do not occur elsewhere. Therefore, my individual theory is that certain skilled workers in obsidian developed or made a specialty of this form. In other words, a peculiar art was developed by a certain clan or group of families, as has been observed in Greene County, Ohio. [Illustration: FIG. 155. (S. 1–2.) This is a flint chipped in an imitation of a moose antler, and was found by W. H. Davis in Lowell County, Ohio. It is a remarkable specimen. ] Regarding the amount of obsidian available for chipping, Professor Barr states: “The great obsidian beds of Lake and Napa counties, which I have examined several times, could furnish all the Indians of the United States with material for generations. The hills are full of great blocks of obsidian, too heavy for a man to handle, and it breaks as straight as a shingle.” [Illustration: FIG. 156. (S. 1–1.) A fish, a crescent, and possibly a bird, together with highly specialized points in carnelian and moss-agate, found near Arlington, Oregon. The skilled worker was able to make effigies of human beings, as well as of birds and animals, in agate, etc. F. A. Thomas’s collection, California. ] I call attention to Fig. 160, from Mr. Reeder’s collection, Michigan. In this plate are seven large flint objects. The spear-head does not differ from other similar kinds of spears, but the flint celt, to the right, is unusually well-shaped and so highly polished that the flake depressions are scarcely visible. To obliterate all traces of chipping must have required a great deal of labor. The round, flat disc at the bottom is very carefully worked, and cannot be classed as unfinished. It is purposely worked in this form. What was the object of the natives in making this, I leave to others. [Illustration: FIG. 157. (S. 1–9.) In addition to other specimens, this represents four Indian heads, showing both the features and the method of hair-dressing. These are from the collection of J. T. Reeder, Houghton, Michigan, and were collected by him in Tennessee and Kentucky. ]