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Bones of earliest mammals being studied at Smithsonian Institution. Washington, D.C., May 8. One of the largest collections of the bones of some of the earliest mammals are now being studied and classified at the Smithsonian Institution. Dr. C. Lewis Gazin, Smithsonian paleontologist shown in the photograph, obtained specimens of [more] than 50 species of long-extinct creatures from the so-called "Puerco and Torrejon Horizons" in New Mexico last summer. The Puerco and Torrejon formations date back approximately 50,000,000 years, to the time when present life forms began to make their appearance, 5/8/37

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