CONTENTS
| 1. | Abbot, C. G. Weather dominated by solar changes. 18 pp., 4 text figs. Feb. 5, 1931. (Publ. 3114.) |
| 2. | Wetmore, Alexander. The avifauna of the Pleistocene in Florida. 41 pp., 6 pls., 16 text figs. Apr. 13, 1931. (Publ. 3115) |
| 3. | Walcott, Charles D. (With explanatory notes by Charles E. Resser.) Addenda to descriptions of Burgess shale fossils. 46 pp., 23 pls., 11 text figs. June 29, 1931. (Publ. 3117.) |
| 4. | Thériot, I. Mexican mosses collected by Brother Arsène Brouard—III. 44 pp., 22 text figs. Aug. 25, 1931. (Publ. 3122.) |
| 5. | Brackett, F. S., and Liddel, Urner. Infra-red absorption bands of hydrogen cyanide in gas and liquid. 8 pp., 5 text figs. Aug. 5, 1931. (Publ. 3123.) |
| 6. | Snodgrass, R. E. Morphology of the insect abdomen. Part I. General structure of the abdomen and its appendages. 128 pp., 46 text figs. Nov. 6, 1931. (Publ. 3124.) |
| 7. | McAtee, W. L. Effectiveness in nature of the so-called protective adaptations in the animal kingdom, chiefly as illustrated by the food habits of Nearctic birds. 201 pp. Mar. 15, 1932. (Publ. 3125.) |
| 8. | Swanton, John R. Modern square grounds of the Creek Indians. 46 pp., 5 pls., 15 text figs. Nov. 11, 1931. (Publ. 3126.) |
| 9. | Wulf, Oliver R. The determination of ozone by spectrobolometric measurements. 12 pp., 3 pls., 5 text figs. Nov. 30, 1931. (Publ. 3127.) |
| 10. | Miller, Gerrit S., Jr. Human hair and primate patterning. 13 pp., 5 pls., Dec. 19, 1931. (Publ. 3130.) |
| 11. | Aldrich, L. B. Supplementary notes on body radiation. 12 pp., 5 text figs. Feb. 2, 1932. (Publ. 3131.) |
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