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Anatomical Notes on Certain West American Helices

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1898, in volume 50, pages 67-71

Contributions to a Knowledge of the Hymenoptera of Brazil, No. 4: Thynninæ and Additions

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1898, in volume 50, pages 72-75

The Petrifaction of Fossil Bones

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1898, in volume 50, pages 98-100

Notes on Alaskan Water Birds

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1898, in volume 50, pages 126-140

March 22

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1898, in volume 50, pages 155

May 10

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1898, in volume 50, pages 262

Materials toward a Natural Classification of the Cylindrelloid Snails

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1898, in volume 50, pages 264-286

Notes on Mr. Thomas Meehan's Paper on the Plants of Lewis and Clark's Expedition across the Continent, 1804-06

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1898, in volume 50, pages 291-315

Descriptions of five new Phyllostome Bats

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1898, in volume 50, pages 326-337

July 5

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1898, in volume 50, pages 351

Description of a New Genus and Species of Microtine Rodent from Siberia

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1898, in volume 50, pages 368-371

Botanical Observations on the Mexican Flora, Especially on the Flora of the Valley of Mexico

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1898, in volume 50, pages 372-413

Fossil Mollusks and Diatoms from the Dismal Swamp, Virginia and North Carolina; Indication of the Geological Age of the Deposit. With Notes on the Diatoms

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1898, in volume 50, pages 414-428

September 27

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1898, in volume 50, pages 429

Contributions to a Knowledge of the Hymenoptera of Brazil, No. 5: Vespidæ

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1898, in volume 50, pages 445-460

New Cretaceous Fossils from an Artesian Well-Boring at Mount Laurel, N. J

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1898, in volume 50, pages 461-464

A Memorial of Dr. Joseph Leidy

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1898, in volume 50, pages 465-467

November 1

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1898, in volume 50, pages 479

Occurrence of Oryzomys palustris in Southern New Jersey

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1898, in volume 50, pages 480-481

The Occurrence of Marcasite in the Raritan Formation

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1898, in volume 50, pages 485

Report of the Recording Secretary

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1898, in volume 50, pages 500-504

Report of the Librarian

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1898, in volume 50, pages 505-509

Report of the Biological and Microscopical Section

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1898, in volume 50, pages 512-513

Report of the Entomological Section

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1898, in volume 50, pages 514-515

Report of the Botanical Section

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1898, in volume 50, pages 515-517

Reptiles from Sonora, Sinaloa, and Jalisco, Mexico, with a description of a new species of Sceloporus

Published in Proc. Acad. Nat. Sci. Philadelphia, in 1898, in volume 1897, pages 460-464

The Gerrhonotus of the San Lucan fauna, Lower California, with diagnoses of other west American species

Published in Proc. Acad. Nat. Sci. Philadelphia, in 1898, in volume 1898, pages 63-66

Odonata (Dragonflies) from the Indian Ocean, and from Kashmir, collected by Dr. W.L. Abbott

Published in Proceedings Academy Natural Sciences Philadelphia, in 1898, in volume 1898, pages 141-154