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A revision of the recent representatives of the crinoid family Pentacrinidae, with the diagnoses of two new genera
Vol 13, Page 8, Date 1923
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Two new genera related to Narvalina
Vol 13, Page 102, Date 1923
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A new Reticulitermes from the Orient
Vol 13, Page 107, Date 1923
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The origin of the vertebrates
Vol 13, Page 129, Date 1923
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New composites from Salvador
Vol 13, Page 143, Date 1923
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New genera and species of sucking lice
Vol 13, Page 146, Date 1923
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The identification of Raddi's grasses
Vol 13, Page 167, Date 1923
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Opsiandra, a new genus of palms growing on Maya ruins in Petén, Guatemala
Vol 13, Page 179, Date 1923
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A new frog of the genus Leptodactylus
Vol 13, Page 184, Date 1923
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A new lizard of the genus Sceloporus
Vol 13, Page 185, Date 1923
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Dissanthelium, an American genus of grasses
Vol 13, Page 223, Date 1923
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A new Anolis from Haiti
Vol 13, Page 225, Date 1923
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Descriptions of new East Indian Nectariniidae
Vol 13, Page 226, Date 1923
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Notes on Paratylenchus, a genus of Nemas
Vol 13, Page 254, Date 1923
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A Trip to Mexico for Parasites of the Mexican Bean Beetle
Vol 13, Page 259, Date 1923
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The Anatomy and Metamorphosis of the Apple Maggot ( Rhagoletis pomonella Walsh)
Vol 13, Page 260, Date 1923
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The Habits of Bruchus bixae
Vol 13, Page 261, Date 1923
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Pupae of the Walnut Hull Maggot living Two Years ( Rhagoletis suavis, Loew)
Vol 13, Page 262, Date 1923
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Methods for distinguishing natural from cultivated pearls
Vol 13, Page 282, Date 1923
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Gonorhynchus moseleyi, a new species of herring-like fish from Honolulu
Vol 13, Page 347, Date 1923
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Ten new species of trees from Salvador
Vol 13, Page 350, Date 1923
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New species of plants from Salvador
Vol 13, Page 363, Date 1923
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Three new Pemphredonine wasps
Vol 13, Page 369, Date 1923
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A key to some South American bees belonging to the genus Halictus subgenus Chloralictus
Vol 13, Page 383, Date 1923
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New or little known Melastomataceae from Venezeula and Panama
Vol 13, Page 384, Date 1923
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On the identity of a European Chalcidoid parasite of the alfalfa leaf-weevil
Vol 13, Page 408, Date 1923
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Note on plants collected in tropical America
Vol 13, Page 428, Date 1923
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New species of plants from Salvador. II
Vol 13, Page 436, Date 1923