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A new subspecies of Poanes massasoit Scudder
Vol 21, Iss 1, Page 7
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Field keys to the lizards and amphibians of British Guiana
Vol 21, Iss 1, Page 11
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New species and subspecies of African birds
Vol 21, Iss 1, Page 43
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New species from the Oligocene of the Uinta
Vol 21, Iss 2, Page 61
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A new arctic weasel from Southampton Island, Hudson Bay
Vol 21, Iss 2, Page 79
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A synopsis of the genus Metrobates Uhler (Hemiptera: Gerridae)
Vol 21, Iss 2, Page 83
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A new species of Delocrinus
Vol 21, Iss 2, Page 89
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Jurassic insects from Solenhofen in the Carnegie Museum and the Museum of Comparative Zoology
Vol 21, Iss 3, Page 97
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A new turtle from the Duchesne Oligocene of the Uinta Basin, Northeastern Utah
Vol 21, Iss 3, Page 131
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A new Anosteirid from the Uinta Eocene
Vol 21, Iss 3, Page 161
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Neotropical bats in the Carnegie Museum
Vol 21, Iss 3, Page 171
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Revision of the subfamily Thyreocorinae of the Pentatomidae (Hemiptera-Heteroptera)
Vol 21, Iss 4, Page 191
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Natica sancti-vincentii
Vol 21, Iss 4, Page 413
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Obituary: W. J. Holland
Vol 21, Page i
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Errata
Vol 21, Page xiv