CONTENTS. 
PS 
CONTRIBUTED ARTICLES. 
PAGE 
The Rate of the Nervous Impulse in the Ventral Nerve-Cord of 
Certain Worms. By O. P. Jenkins and A. J. CARLSON. 
(From the Hopkins’ Seaside Laboratory and the Phystological 
Laboratory of Leland Stanford, Jr., University.) ~With 
fourteen figures. oh Wr Ong 1 4 UE ae ae 
Notes on the Technique of Weigert's Method for Staining 
Medullated Nerve Fibers. By O. S. Strone, Coluwnbia 
Oniversity, New York’... 0. 3-23 3s 
The Doctrine of Nerve Components and Some of Its Applica- — 
fions,. By C. Jupson. Herrick. : >.) ).ee3 ae 
Columella Auris and Nervus Facialis in the Urodela. By B. | 
Py KRINGSBURY.* 
Editorial Announcement. . : : : : : ‘ : S55 
LITERARY NOTICES. 
The Relations of Biology and Psychology, xxix—The Psychology of 
Action, xxxiii—The Fore-Brain of the Bird, xxxix—The Optic 
Chiasma and the Post-Optic Commissure, xlii—Peripheral 
Nerve Endings in Amphioxus, xliii—On the Lobus Impar of 
the Brain of Cyprinoid Fishes, xliy. 
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