The Journal of
Zoological Research

Edited by
WALTER E. COLLINGE, M. Sc., F. L. S., F. E. S.
The Gatty Marine Laboratory
The University, St. Andrews, Scotland

The subject matter is strictly confined to original zoological
research—systematic and anatomical. Fully illustrated by
lithographic plates and text figures.

Each volume will consist of 4 parts, price $5.

All subscriptions should be forwarded to

Messrs. Dulau & Co., Ltd.
37 Soho Square, London, W., England

GRIFFITH

Incubators

A simple, well constructed bacteriological incubator

The Journal of
Parasitology

A Quarterly devoted to Medical
Zoology

This journal will be a medium for the prompt publication of briefer papers and research notes on animal parasites. Emphasis laid on the morphology, life history and biology of zooparasites and the relations of animals to disease.

Subscription, $2.00 a volume

Managing Editor,

HENRY B. WARD,

Univ. Illinois, Urbana, Ill.

Gage—The Microscope

An Introduction to Microscopic Methods and to Histology

By SIMON HENRY GAGE

Twelfth edition in press. Entirely rewritten, with many new illustrations.

Price $2.00.

This work aims to give help to everyone who uses the microscope, whether he is a beginner or an advanced worker.

Comstock—A Manual for the Study of Insects