Check-list of North American birds : according to the canons of nomenclature of the American Ornithologists' Union.

1889 Abridged Edition (Revised)

Studies on the embryology of the Sipunculidae. I. The embryonal envelope and its homologue. ... By John H. Gerould.

no. 1

A contribution to American thalassography : Three cruises of the United States Coast and geodetic survey steamer "Blake", in the gulf of Mexico, in the Caribbean sea, and along the Atlantic coast of the United States, from 1877 to 1880 / by Alexander Agassiz ...

2

North American oölogy. By Thomas M. Brewer. Part I.--Raptores and Fissirostres.

Pt. 1

American fossil cycads, by G.R. Wieland.

1

American natural history. Volume 3. Part 1.--Mastology. By John D. Godman.

3

I. The genera Pedilanthus and Cubanthus, and other American Euphorbiaceae, by Charles Frederick Millspaugh. II. Two new stonecrops from Guatemala, by Raymond Hamet.

v.2:no.9(1913)

Studies of American plants, by Paul C. Standley.

v.4:no.8(1929)

Additions to our knowledge of the American and Hawaiian floras, by Earl Edward Sherff.

v.22:no.7(1941)