As our primary interest was in the Tank Site, and our time limited, archaeological reconnaissance in the vicinity was necessarily curtailed. Four lesser sites yielding core tools, and manos were noted along the small tributary system on which the Tank Site is located. One of these, LAn-2, was test-pitted. An additional site, LAn-6, typified by "Topanga-like" artifacts, was recorded on the western periphery of the San Fernando Valley just over the divide from Topanga Canyon. LOCATION AND DESCRIPTION OF SITES The prefix and numbers used in this paper to designate archaeological deposits will follow the system now being used by the University of California Archaeological Survey. All data on sites are filed in the central office of the Survey, Department of Anthropology, University of California, Berkeley. In this paper, LAn stands for Los Angeles County. _LAn-1 (Tank Site)._--Our type locality, the Tank Site, occupies a well-drained knoll high up on the eastern side of Topanga Canyon (elevation 1,214 feet) some 4 miles inland from the Pacific Coast. The tract of land upon which the site lies is known locally as the "92 acres" (See Treganza and Malamud, 1950; and maps 1 and 2). _LAn-2 (map 3)._--This site lies on the "92 acres," about 350 yards west-southwest of the Tank Site, on the same ridge but at a lower elevation. At this point the ridge narrows almost to a hogback about 75 feet wide, terminating in a small knoll. There were signs of occupation for a distance of 300 feet along the ridge. The exact limits could not be determined since the vegetation had been bulldozed off earlier and the deposit had been dragged. Excavation at this site established the basis of Topanga Culture Phase 11. _LAn-3._--This site is located on the Trippet Ranch just within the city limits of Los Angeles. It occupies the same ridge as the Tank Site but lies at a higher elevation and some 450 yards to the east. The western edge of the site and the nearby canyon are covered with live oaks, sage, and manzanita. Most of the surface has been disturbed, for the land was formerly planted to grain. The limits of habitation are marked by compact light-brown soil, which discolors slightly the yellow surrounding earth. There is no perceptible rise in contour. Artifacts typical of the Tank Site were observed weathered out of the occupation surface. The former living area was estimated about a hundred square yards. The deposit appeared only a few inches deep; however, this was probably a village site, though occupied only for a short time. An abundance of tarweed, restricted to the deposit area, might well be considered a vegetation association.