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B.S. 22131. Tide channels or cangrejales, mouth of Río Ajó at low tide. Black spots are crabs. Good feeding grounds for shorebirds. Lavalle, Buenos Aires, Argentina. October 25, 1920.

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B.S. 22132. Flats grown with salicornia at mouth of Río Ajó. Lavalle, Buenos Aires, Argentina. October, 25, 1920.

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B.S. 22137. Cormorants [[underlined]] Phalacrocorax v. vigua [[/underlined]] and gulls, [[underlined]] Larus maculipennis [[/underlined]] at mouth of Río Ajó. Lavalle, Buenos Aires, Argentina. October 25, 1920.