In this ASCII text version the following have been used: ['a], ['e], ['i], ['o], ['u] for acute accent on a, e, i, o, u. [M] and [F] for [MALE] and [FEMALE] symbols. In several of the past twelve years field parties from the Museum of Natural History have collected mammals in the Mexican state of Sinaloa. Most of the collections contained only a modest number of specimens because they were made by groups that stopped for short periods on their way to or from other areas, but several collections are extensive. Field work by representatives of this institution now is underway in Sinaloa with the aim of acquiring materials suitable for treating the entire mammalian fauna of that state.…
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