is the ratio n/m.] If this formula is applied here, one finds that winds from the southeast (that is, from the New Hebrides and New Caledonia) would have to be more than 100 times more favorable than winds from the northeast (from Guadalcanal and San Cristobal) in order to compensate for the distance of Rennell from the New Hebrides and New Caledonia. Even so, tropical storms with unusually strong winds, frequent during some parts of the year, possibly account for the present distributional pattern of bats and birds that live on Rennell. Whatever the means by which bats of the species _P. tonganus_ reached Rennell, the fact remains that specimens from Rennell cannot be distinguished from specimens of _P. tonganus geddiei_ from the New Hebrides and New Caledonia, more than 500 miles to the southeast. NOTE: An important and interesting paper on zoogeography of bats, which was published too late to be included here, is: Krzanowski, A., 1967, The magnitude of islands and the size of bats (Chiroptera), Acta Zool. Cracoviensia, 12:281-348. LITERATURE CITED ANONYMOUS. 1944. Gazetteer of Solomon Islands, Bismarck Archipelago, and Islands of the south-eastern end of New Guinea. Hydrographic office of the United States Navy Department, No. 881. ANDERSEN, K. 1908. Twenty new forms of _Pteropus_. Ann. Mag. Nat. Hist., ser. 8, 2:361-370, October. 1909a. On the characters and affinities of "Desmalopex" and Pteralopex. Ann. Mag. Nat. Hist., ser. 8, 3:213-222, February. 1909b. Two new bats from the Solomon Islands. Ann. Mag. Nat. Hist., ser. 8, 3:266-270, March. 1909c. On the fruit-bats of the genus _Dobsonia_. Ann. Mag. Nat. Hist., ser. 8, 4:528-533, December. 1911. Six new fruit-bats of the genera _Macroglossus_ and _Syconycteris_. Ann. Mag. Nat. Hist., ser. 8, 7:641-643, June. 1912. Catalogue of the Chiroptera in the collection of the British Museum, British Mus. (Nat. Hist.), London, 1:ci + 1-854, 79 figs. BADER, R. S., and HALL, J. S. 1960. Osteometric variation and function in bats. Evol., 14:8-17, 3 figs., March 21. BAKER, R. H. 1951. The avifauna of Micronesia, its origin, evolution, and distribution. Univ. Kansas Publ., Mus. Nat. Hist., 3:1-359, 16 figs., June 12. BEAUFORT, L. E. DE. 1951. Zoogeography of the land and inland waters. Sidgwick and Jackson, London, viii + 208 pp., maps. BELKIN, J. N. 1962. The mosquitoes of the South Pacific (Diptera, Culicidae). Univ. California Press, Berkeley, 1:xii + 1-608, July 18. BENEDICT, F. 1957. Hair structure as a generic character in bats. Univ. California Publ. Zool., 59:285-548, 9 pls., 4 figs., October 10. BRIGHAM, W. T. 1900. An index to the islands of the Pacific Ocean. Mem. Bernice P. Bishop Mus., Honolulu, 2:1-170, maps. CRANSTONE, B. A. L.