Proceedings of the American Academy of Arts and Sciences. 

 Vol. XXXIII. No. 14. —April, 1898. 



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 POLTCH^TE ANNELIDS. 



By Margaret Lewis. 

 With Eight Plates. 



