Explorations and Field-work of the Smithson. Inst. in 1917, Smithson. Misc. Colls., vol. 68, no. 12, pp. 105-133, Washington, 1918. Castles and towers of the Hovenweep. The Railroad Red Book, vol. xxxv, no. 2, pp. 11-14, Denver, 1918. An appreciation of Mesa Verde National Park. [Introduction to] Mesa Verde National Park, Colorado. United States Railroad Administration, National Park Series. [Chicago, 1919.] Prehistoric villages, castles, and towers of southwestern Colorado. Bull. 70, Bur. Amer. Ethn., Washington, 1919. Designs on prehistoric Hopi pottery. Thirty-third Ann. Rept. Bur. Amer. Ethn., pp. 207-284, Washington, 1919. Prehistoric island culture areas of America. Thirty-fourth Ann. Rept. Bur. Amer. Ethn., Washington, ----. [In press.] Sun worship of the Hopi Indians. Smithson. Rept. for 1918, Washington, ----. [In press.] INDEX TO TITLES Aborigines of Porto Rico, 19 Abyla pentagona, tubes in larger nectocalyx of, 5 Acalephæ collected by the “Albatross”, 7 Acalephæ of coast of New England, 6 Acalephæ, report on, 5 Acalephs and Polyps, 6 Acalephs from the Tortugas, 6 Actinozoa, 7 Adobes in cliff-dwellings, 20 Agalma, development of, 7 Alaurina in New England waters, 6 Alaurina prolifera Busch., 6 Alósaka cult of the Hopi, 17 Altar, Owakülti, at Sichomovi, 17 Altars, winter solstice, at Hano, 16 American Association, report of meeting of, 17 Amphiura, calcareous plates of, 8 Amphiura, new parasite of, 10 Amulets, precolumbian West Indian, 18 Ancient megalith in Jalapa, Vera Cruz, 19 Ancient Pueblo and Mexican water symbol, 19 Ancient Zuñi pottery, 20 Angelopsis, relationship to Siphonophora, 10 Animal figures on Mimbres Valley pottery, 23 Annelid messmates with a coral, 6 Anthropology, 15 Antillean statuette, 20 Antilles, engraved celts from, 23 Antiquities of eastern Mexico, 19 Antiquities of Mesa Verde National Park, 20, 21 Antiquities of upper Verde and Walnut Creek, 21 Antiquities of the West Indies, 22 Arbacia, development of pluteus of, 5 Archæological expedition to Arizona in 1895, 17 Archæological investigations in New Mexico, Colorado and Utah, 24 Archæological trip to West Indies, 18 Archæological work in Mesa Verde National Park, 24 Archæology of Barbados, 23 Archæology of lower Mimbres Valley, 22 Archæology of Porto Rico, 20 Arizona Indians, ceremonial circuit among, 12 Arizona ruins which should be preserved, 19 Ascorhiza occidentalis, 10 Asterias, calcareous plates of, 8 Astrangia danæ, anatomy of, 9 Athorybia, a new, 10 Austrian folk-religion, figurines in, 17 A-wa′-to-bi, a Tusayan legend, 13 Awatobi, ruins of, 15 Bandelier collection of documents, 14 Barbados, archæology of, 23 Basket dances, Hopi, 16 Bay of Fundy, surface fauna of, 9 Bermudas, origin of form of, 9 Bermudas, origin of outlines of, 10