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146
THE POPULAR SCIENCE MONTHLY
Kleinenberg, N.
1872 Hydra. Eine anatonusch-entwicklungsgeschichtliche Untersuchung. Leipzig, 4o, vi + 90 pp., 4 Taf.
Mayer, A. G.
Rhythmical Pulsations in Scyphomedusae. Publ. Carnegie Inst., Washington, no. 47, 62 pp.
Parker, G. H.
The Reactions of Metridium to Food and other Substances. Bull. Mus. Comp. Zool., vol. 29, pp. 107-119.
Saicassa, P.
Zur Histologic der Ctenophoren. Arch. mik. Anat., Bd. 40, pp. 167-243, Taf. 8-12.
Schaeppi, T.
Ueber den Zusammenhang von Muskel und Nerv bei den Siphonophoren. Mitth. Naturwiss. Ges. Winterthur, Jahrg. 1903-04, pp. 140-167.
Sherrington, C. S.
The Integrative Action of the Nervous System. New York, 8vo, xvi + 411 pp.
Wolff, M.
Das Nervensystem der polypoiden Hydrozoa und Scyphozoa. Zeitschr. allg. Physiol., Bd. 3, pp. 191-281, Taf. 5-9.