Section A. A large popular Natural History in several volumes, with the topics treated in due proportion, by authors of unquestioned authority. 8vo. 7½ × 10¼ in.

The books so far publisht in this section are:

FISHES, by David Starr Jordan, President of the Leland Stanford Junior University. $6.00 net; carriage extra.

AMERICAN INSECTS, by Vernon L. Kellogg, Professor in the Leland Stanford Junior University. $5.00 net; carriage extra.

Arranged for are:

SEEDLESS PLANTS, by George T. Moore, Head of Department of Botany, Marine Biological Laboratory, assisted by other specialists.

WILD MAMMALS OF NORTH AMERICA, by C. Hart Merriam, Chief of the United States Biological Survey.

BIRDS OF THE WORLD. A popular account by Frank H. Knowlton, M.S., Ph.D., Member American Ornithologists Union, President Biological Society of Washington, etc., etc., with Chapter on Anatomy of Birds by Frederic A. Lucas, Chief Curator Brooklyn Museum of Arts and Sciences, and edited by Robert Ridgway, Curator of Birds, U.S. National Museum.

REPTILES AND BATRACHIANS, by Leonhard Steineger, Curator of Reptiles, U.S. National Museum.

Section B. A Shorter Natural History, mainly by the Authors of Section A, preserving its popular character, its proportional treatment, and its authority so far as that can be preserved without its fullness. Size not yet determined.