Blood groups of Brazilian Indians^†

This work was made possible by the generosity of the Brazilian Government, through Dr. Olympio da Fonseca, Director of the Instituto Oswaldo Cruz; Dr. Walter Oswaldo Cruz, Director of the Department of Haematology of that Institute; Dr. Modesto Donatini Dias da Cruz, Director of the Serviço de Proteção dos Indios; General Borges Fortes, Presidente da Fundação Brasil‐Central; Orlando Vilasbôas, Chefe da Expedição Xingú‐Roncador, and Dr. Pedro E. Lima. To all these, and to the Brazilian Air Force which supplied us with air‐transport, we offer sincere thanks. We are especially indebted to Dr. A. E. Mourant, Director of the Blood Group Reference Laboratory, the Lister Institute, who not only provided the very valuable sera for our tests but calculated, the gene frequencies from our results, and whom we would gratefully thank for his help.