IMPORTANT BOOKS FOR THE NATURALIST.

Handbook of Invertebrate Zoology.

For Laboratories and Seaside Work. By Prof. W. K. Brooks, Ph. D., Director Chesapeake Zoological Laboratory of the Johns Hopkins University.

Price, $3.00

This work is published in one large 8vo volume of 400 pages. Illustrated with 200 entirely new cuts, from drawings by the author, or made under his direct supervision.

Handbook of Entomology.

By Prof. Charles V. Riley, U. S. Entomologist, Chief of Entomological Commission, State Entomologist of Mo., etc., etc. In press. Cloth. 8vo.

Price, $3.00

International Scientists’ Directory.