New species of crinoids from Illinois and other states.

Each plate accompanied by leaf of descriptive letterpress.

New species of palaeozoic invertebrates from Illinois and other states.

Each plate accompanied by leaf of descriptive letterpress.

Description of new species of palæozoic Echinodermata /

Mode of access: Internet.

New species of North American bees of the genus Dufourea (Hymenoptera, Halictidae) with descriptions of two previously undescribed females /

Cover title.

A redescription of the genus Parathelohania Codreanu 1966 (Microsporida: Protozoa) with a reexamination of previously described species of Thelohania Henneguy 1892 and descriptions of two new species of Parathelohania from anopheline mosquitoes /

Issued Dec. 1974.

Revision of Microsporida (Protozoa) close to Thelohania : with descriptions of one new family, eight new genera, and thirteen new species /

Issued Sept. 1976.

Descriptions of several new species of North American fishes.

Journ. Acad. Nat. Sci. Phila., 1818. 1. 222-235. 5 pls. 363-368. 2 pls.