KEELEY TOWERS, location of, 45 KIDDER, A. V. _See_ MORLEY AND KIDDER. KIVA OF UNIT TYPE HOUSE, architectural features of, 51 KIVAS— double-walled, 39 entrances to, 42 indicated by depressions, 42 indicative of social units, 70 structural features of, 37 LION TOWER— description of, 55 ground plan of, 55 LITTRELL TOWER. _See_ LION TOWER. LOST CANYON CLIFF-HOUSES, 40 “LOWER HOUSE,” of Aztec Spring Ruin, 25, 27 MCELMO BLUFF, ruins at, 60 MCELMO DISTRICT— distinctive feature of ruins of, 15 investigations in, of 1917, 10 MCELMO RUINS, latest work on, 14 MCLEAN BASIN— ground plan of ruins of, 56 pottery found in, 56 ruins of, described, 55 towers of, 56 MANCOS REGION, towers of, 58 MASONRY— of Hill Canyon Ruins, 42 skill shown in construction, 40 varieties of, 41 MEGALITHIC RUINS, 60 MEGALITHS, circular structures of, 60 MESA VERDE— cliff-dwellings and villages of, 9 culture of inhabitants of, 9 MESA VERDE RUINS, comparative age of, 72 METATES— found at Surouaro, 17 with skeletal remains, 67 MEXICAN TRIBES AND THE PUEBLOS, relation between, 69 MITCHELL, H. L., notes contributed by, 11 MITCHELL SPRING RUIN, description of, 19 MITCHELL SPRING VILLAGE, origin of the name, 12 MONOLITHS IN WALLS, 30 MONTEZUMA VALLEY, distinctive feature of ruins in, 15 MOOREHEAD, WARREN K., ruins described by, 12 MORGAN, L. H.— investigation of ruins by, 10, 11 notes of, on ruins of Mesa Verde, 11 on Mitchell Spring Ruin, 19 on Mud Creek village, 21 MORLEY, S. G.— excavations conducted by, 30 work of, 13 MORLEY, S. G., and KIDDER, A. V., ruins described by, 14 MOUNDS— near Mummy Lake, 15 of Mud Spring Ruin, 21 MUD SPRING RUIN, description of, 20 MUMMY LAKE MOUNDS, 15 NELSON, N. C., on Pueblo ruins, 17 NEWBERRY, J. S., on Surouaro, 17 NORDENSKIÖLD, BARON G., work of, 13 OAK SPRING HOUSE, description of, 29 OLD SPANISH TRAIL, route of, 36, 68 OPEN-AIR RUINS OF DOVE CREEK, 28 PARKER, GORDON, assistance of, 40 PICTOGRAPHS— colored, 65 covered with plaster, 65 incised on stone, 65 near Ruin 5, 49 near slab inclosures, 63 PIERSON LAKE RUIN. _See_ SQUAW POINT RUIN. PILASTERS LACKING IN TOWERS, 42 PLASTERING, interiors covered with, 41 POTTERY— culture areas determined by, 69 description of, 66 PRUDDEN, T. MITCHELL— articles by, on ruins of San Juan watershed, 12 excavations conducted by, 19 on towers as part of composite ruins, 44 PUEBLO ARCHITECTURE— elements of complex, 73 of local origin, 70 PUEBLO CULTURE, direction of its migration, 72 PUEBLO TRIBES, origin of, 69 “PURE TYPE” defined, 16