here the surface has been considerably disturbed, but, at the same time, a large number of artifacts have been exposed and are to be found scattered over the dark, friable midden soil, interspersed with rejects and shell fragments. The artifacts noted consist of general core tools and a possible mano fragment. One shell disk bead (diameter, 3 mm.; thickness, 1 mm.; diameter of perforation, 1 mm.; unidentifiable shell) was collected.

LAn-9.—Located on a small rocky knoll, formed by a spur descending from the range on the west side of the canyon, the site is .5 (unless specified, all mileages noted are in air miles) of a mile northwest of LAn-8 and .3 of a mile due south of the ranch house of R. Kiewit. Water is available at a spring, .25 of a mile northwest, rising from the bed of an intermittent creek that drains into Topanga Creek.

In appearance the site is very different from LAn-8. The mound soil has been consolidated to a near-clay, so that it varies only from the surrounding clayey soil in being somewhat darker. It extends over an area of 100 square feet, but few artifacts are evident on the surface. Those collected consist of 8 single-edged scraper planes and 1 bifacial chopper. Of the planes, 2 were additionally utilized as choppers on the edge opposite that which had been worked. All artifacts were basalt with the exception of 2 quartzite planes. Patination was evident on all the basalt specimens, though not as heavy as on similar implements from a number of the other sites.

LAn-10.—This site is situated on the adjoining ridge, only .13 of a mile northwest of LAn-9 and is correspondingly closer to the spring, which from here is due north. Both in physiographic location and appearance the two sites are very similar.

The area covered by mound soil stretches along the ridge some 250 feet and is 70 feet wide. But the soil is compact and consolidated and only slightly dark. A portion of the site area has been somewhat disturbed by the construction of a milk house, stockyard, and fences. Artifacts picked up from the surface consist of manos, choppers, scraper planes, and hammerstones. Of the manos, 5 are bifacial—3 with parallel wear surfaces, 2 wedge-shaped in cross section—and of these, 2 are trifacial, with the two sides that form the keeled back meeting at right angles. In cross section, all the used areas are only slightly convex. Most show considerable wear and good shoulder development, display pecking on their grinding surfaces, and all but 2 granitic specimens are of sandstone. A single monofacial chopper of basalt is well battered along its edge. Out of 7 single-edged planes, 2 have been secondarily worked and used as choppers on an edge other than that developed on the periphery of the plane, and 6 are basalt and 1 is quartzite. One small, flat scraper has two localized adjacent concavities struck from its margin and is also of basalt. Of the 3 core hammerstones, 2 are basalt and 1 is quartzite. Considerable chemical alteration is obvious on even the flaked surfaces.

LAn-11.—Located in the vineyard of the Kiewit Ranch, this site is less than .2 of a mile west of north from LAn-10. The spring already mentioned is immediately to the east, and another, on the property of S. Barton, is .3 of a mile north-northeast.

This site has much in common with LAn-9 and LAn-10. The sloping knoll on which the site is situated is part of the ridge that forms the north bank of the intermittent creek. The leeched, indurated soil is hardly recognizable as occupational deposit, but the fact that it forms a site is obvious from its slightly darker coloring and the scattered surface artifacts and reject material. These are thinly strewn over an area of 200 feet by 100 feet, and are found to a depth of 2 feet in the bank resulting from a road cut at the base of the site.

The 10 single-edged planes that come from the surface range from large to small, 9 of which are basalt and 1 a pink mudstone. A single massive double-ended plane of basalt is much battered on its worked edges, which are flaked back on their upper side. Battering is also in evidence along the flaked edge of 4 bifacial choppers, 3 of which are basalt and 1 quartzite. Out of 4 basalt flake scrapers, one has been much used; and of 4 core hammerstones, 2 are basalt, 1 is quartzite, and 1 is mudstone. Manos were represented by 3 bifacial types, the grinding surfaces of 2 being parallel, and 1 meeting at an angle to effect a wedge-shaped cross section. All are well-shouldered, 1 displaying a pecked depression on a single wear surface; 2 are of sandstone, 1 of which is carbonized; and the third is of an igneous rock. Again, on all the basalt specimens the patination is very marked.

LAn-12.—The largest site yet found in the canyon is on the property of Mr. Miller on the road to the Trippet Ranch, .25 of a mile southeast of the Tank Site across an intermittent creek. It was noted that in the creek bed, just downstream from the Miller residence, pools of water, which, according to Mr. Trujillo were spring fed, an exceptionally dry summer season.

The site extends from the ridge where the house is located into the knoll west of the orchard, covering an area of 400 by 300 feet to a depth of at least 30 inches. Artifacts are plentiful on the ploughed and cultivated surface, and the highly indurated mound soil is dark and clayey. Where the deposit has been cut by recent developments, little worked stone is found in the banks; and a 5-foot square pit netted only one fragment of a ground slate pendant, though the deposit extended below the 30 inches to which the excavation proceeded. From the walls of the pit it could be noted that some soil profile had already developed.

Tools from the surface included general core tools, manos, and metates. A basin metate had been reported; and a fragment of one, of sandstone and shaped on its outer surface, was found. Of 9 manos and mano fragments, 5 are bifacial and relatively thin and 4, monofacial. All but 2 of the monofacial artifacts are sandstone, these being of a granitic rock. In cross section the majority of grinding surfaces are unusually convex, especially as they reach the edge and roll partly up the side. A single basalt pestle fragment was obtained. Scraper planes are well represented by 10 with a U-shaped edge development, some well-battered along the worked margin; and 25 single-edged planes, some of which are very large and most displaying flaking back on their edges, generally on the upper surface of the used edge. Four of quartzite and 1 of felsite porphyry are single-edged, the remainder are basalt. The 4 side scrapers are thin flakes, 2 of basalt, 2 of chert. The 3 choppers are of basalt, 1 having served additional use as a hammerstone, and the 4 hammerstones are basalt cores. Patination is noticeable on all, and smoothed flake scars are not uncommon.

LAn-13.—Six bedrock mortars were found here in a sandstone outcrop of the south bank of the creek, 200 feet upstream from the Kiewit Ranch. As the area is covered by a relatively dense oak grove, the fact that no artifacts were found on the surface in the vicinity may be due in part to the thick fall of dead leaves. However, the soil here beneath the leaf mold is no different from that of the region as a whole, being of a light-colored clayey consistency.

LAn-14.—Three-tenths of a mile northeast of Mineral Springs is a basalt quarry and possible habitation site. The spring water is potable and affords the nearest available water source. Over an area of 100 by 75 feet, surrounding the basalt outcrop, the sandy soil is somewhat darker. Whether this is owing to the decomposition of organic refuse strewn about a habitation site or merely to rock weathering, or in part to both, was indeterminable. The only evidence of former activity are several percussion bulbs and a number of specimens displaying a small amount of regular chipping, which suggest crude scrapers. All of these pieces, moreover, have