CONTRIBUTIONS FROM THE ZOOLOGICAL LABORATORY OF THE 

 MUSEUM OF COMPARATIVE ZOOLOGY AT HARVARD COLLEGE, 

 UNDER THE DIRECTION OF E. L. MARK, No. XC. 



STUDIES ON THE CENTRAL AND PERIPHERAL NER- 

 VOUS SYSTEMS OF TWO POLYCH^TE ANNELIDS. 



By Margaret Lewis. 



Presented by E. L. Mark, May 12, 1897. 

 Table of Contents. 



I. 

 II. 



