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Classification of the Ichneumon-flies, or the superfamily Ichneumonoidea
Vol 23, Page 1, Date 1900
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A new species of moths of the superfamily Tineina from Florida
Vol 23, Page 225, Date 1900
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Life histories of some North American moths
Vol 23, Iss 1209, Page 255, Date 1900
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Synopsis of the family Tellinidae and of the North American species
Vol 23, Iss 1210, Page 285, Date 1900
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The pelvic girdle of zeuglodon, Basilosaurus cetoides (Owen), with notes on other portions of the skeleton
Vol 23, Iss 1211, Page 327, Date 1900
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A new fossil cyprinoid, Leuciscus turneri, from the Miocene of Nevada
Vol 23, Iss 1212, Page 333, Date 1900
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A list of fishes collected in Japan by Keinosuke Otaki, and by the United States steamer Albatross, with descriptions of fourteen new species
Vol 23, Iss 1213, Page 335, Date 1900-12-10
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Synopsis of the family Cardiidae and of the North American species
Vol 23, Iss 1214, Page 381, Date 1901
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Revision of the Orthopteran genus Trimerotropis
Vol 23, Iss 1215, Page 393, Date 1901
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The hermit crabs of the Pagurus bernhardus type
Vol 23, Iss 1216, Page 451, Date 1901
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On a new species of spiny-tailed iguana from Utilla island, Honduras
Vol 23, Iss 1217, Page 467, Date 1901
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A new systematic name for the yellow boa of Jamaica
Vol 23, Iss 1218, Page 469, Date 1901
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On the wheatears (Saxicola) occurring in North America
Vol 23, Iss 1220, Page 473, Date 1901
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List of fishes collected in the River Pei-Ho, at Tien-Tsin, China, by Noah Fields Drake, with descriptions of seven new species
Vol 23, Iss 1221, Page 483, Date 1901-02-25
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Key to the isopods of the Atlantic coast of North America with descriptions of new and little known species
Vol 23, Iss 1222, Page 493, Date 1901
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Some spiders and other Arachnida from southern Arizona
Vol 23, Iss 1223, Page 581, Date 1901
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A new dinosaur, Stegosaurus marshi, from the Lower Cretaceous of South Dakota
Vol 23, Iss 1224, Page 591, Date 1901
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New Diptera in the U.S. National Museum
Vol 23, Page 593, Date 1901
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A list of the ferns and fern allies of North America north of Mexico, with principal synonyms and distribution
Vol 23, Iss 1226, Page 619, Date 1901
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A systematic arrangement of the families of the Diptera
Vol 23, Iss 1227, Page 653, Date 1901
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A comparison of the osteology of the jerboas and jumping mice
Vol 23, Iss 1228, Page 659, Date 1901
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A revision of certain species of plants of the genus Antennaria
Vol 23, Iss 1230, Page 697, Date 1901
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Description of a new species of snake from Clarion island, west coast of Mexico
Vol 23, Iss 1231, Page 715, Date 1901
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A review of the lancelets, hag-fishes, and lampreys of Japan, with a description of two new species
Vol 23, Iss 1233, Page 725, Date 1901-07-16
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The proper names of Bdellostoma or Heptatrema
Vol 23, Iss 1234, Page 735, Date 1901-06-06
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List of fishes collected in 1883 and 1885 by Pierre Louis Jouy and preserved in the United States National Museum, with descriptions of six new species
Vol 23, Iss 1235, Page 739, Date 1901-07-02
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Four new symmetrical hermit crabs (pagurids) from the West India region
Vol 23, Iss 1236, Page 771, Date 1901
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Synopsis of the Lucinacea and of the American species
Vol 23, Iss 1237, Page 779, Date 1901
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On a slug of the genus Veronicella from Tahiti
Vol 23, Iss 1238, Page 835, Date 1901
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A review of the apodal fishes or eels of Japan, with descriptions of nineteen new species
Vol 23, Iss 1239, Page 837, Date 1901-08-28
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A review of the cardinal fishes of Japan
Vol 23, Iss 1240, Page 891, Date 1901-10-02