1.
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A contribution to the knowledge of the l fauna of El Petén, Guatemala Stuart, Laurence Cooper
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2.
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Additions to the knowledge of the amphibians of the Estacion de Biologia Tropical "Los Tuxtlas" Pérez Higareda, Gonzalo
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3.
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A contribtion to our knowledge of the herpetofauna of the Mexican state of Aguascalientes Anderson, James Donald - William Z Lidicker, Jr
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4.
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Contributions to the knowledge of the systematic arrangement and anatomy of certain genera and species of Squamata Beddard, Frank E
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5.
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Second addition to the knowledge of the Batrachia and Reptilia of Costa Pica Cope, Edward Drinker
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6.
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Third addition to a knowledge of the Batrachia and Reptilia of Costa Rica Cope, Edward Drinker
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7.
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Contributions to our knowledge of the duration of life in vertebrate animals Flower, Stanley S
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8.
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Addresses in memory of Edward Drinker, Cope delivered at the meeting in the hall of the American Fhilosophical Society held at Philadelphiafor promotig useful knowledge Anonymous
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9.
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A contribution to a knowledge of the herpetology of a portion of the savanna region of central Petén, Guatemala Stuart, Laurence Cooper
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10.
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Additions to the knowledge of the herpetofauna of Oaxaca, Mexico Hobart M Smith
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