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We are indebted to E. 0. Wilson and R. H. MacArthur for generously making available to us their data for insular number of bird species in the East Indies and East-Central Pacific.Refer- ences for the data are to be found in their paper.'3In the near future we hope to publish a longer, more extensive survey of species-area phenomena in birds, and at that time we plan to cite the species data as well as environmental data used in the present study.
Byrne et al. (Wed,) studied this question.