Figure 1. Reconstruction of the nervous system of Carinella shown from the ventral side. Explanation in text. ×75. Figure 2. Figure at the left side view of a reconstruction of the upper portion of the central nervous system of Carinella. The figures at the right are from cross sections taken at various levels. The upper and the two lower figures are from one side only. Further explanations in the text. ×75. [Illustration] [Illustration] =================================================================== The KA Binocular Microscope [Illustration] Is of great value in all biological work where low and medium powers are employed. In embryology the true stereoscopic image shows the relative position of important details. This feature is of great assistance to the student and makes the instructor's work easy. _Write for booklet_ Bausch & Lomb Optical Co. of California 154 Sutter St., San Francisco, Cal. =================================================================== _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 [Illustration] 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.