In the entire West are many small delicate points made of semi-precious stones. A plate of these is shown in Fig. 97, from Mr. Hamilton’s collection, Wisconsin. Here we have the triangular points, oval knives, the expanding at base, the slightly barbed, and the deeply barbed. Figs. 98 and 99 present interesting and yet common types of specimens from a given locality. These range from the triangular to the expanding base and the contracting base; in Fig. 99 a rare specimen having four notches is shown. Fig. 100 presents typical Connecticut forms. The one to the left is a knife. Fig. 102, from Mr. Arnold’s collection, Albany, New York, presents nine beautiful specimens, in nearly all of which the stem is straight. The barbs are very long and wing-like, as in the case of many obsidian, agate, and carnelian points from the Northwest. Fig. 80, of a buffalo skull found in North Dakota many years ago, and belonging to the Historical Department of the State of Iowa, illustrates the penetrating power of the flint arrow-head. This is a long, slender arrow driven into the skull, so that the point penetrated the brain. Fig. 81, a skull from California, Mr. H. K. Deisher’s collection, Pennsylvania, illustrates a human skull in which an arrow-point was driven into the brain through the frontal bone over the left eye. I have seen in museums human vertebræ and other bones which were pierced by flint arrow-heads. Such may be observed in the Ohio State Archæological, the Peabody, and United States National Museum collections. In the _American Anthropologist_ for 1901 Dr. Thomas Wilson wrote an article entitled “Arrow-Wounds.” This is deserving of preservation and will enable students to realize what an important factor the arrow was in ancient times. I omit all of Dr. Wilson’s remarks on discoveries of human remains in foreign countries in which arrow-points were embedded, and quote a portion of that which relates to the United States:— “The skull of an ancient Indian man of advanced age, originally received by the Smithsonian Institution from Dr. L. G. Yates, of Alameda County, California, and transferred to the Army Medical Museum, exhibits a wound made by a long flint arrow-point which penetrated the left orbit. [Illustration: FIG. 91. (S. 1–2.) Fine broad spear-head. Material: brown flint. Stephen Van Rensselaer’s collection, Newark, New Jersey. ] “The arrow-point exhibited belongs to the class usually called perforators, or drills, but in this instance it was used as an arrow-point.