Proceedings of the American Academy of Arts and Sciences. 

 Vol. XXXVII. No. 21. — April, 1902. 



CONTRIBUTIONS FROM THE ZOOLOGICAL LABORATORY OF THE 

 MUSEUM OF COMPARATIVE ZOOLOGY AT HARVARD COLLEGE, 

 UNDER THE DIRECTION OF E. L. MARK.— No. 129. 



CERTAIN SENSE ORGANS OF THE PROBOSCIS OF THE 

 POLTCHAETOUS ANNELID RHYNCHOBOLUS 

 D1BRANCH1ATUS. 



By Adele Oppeniieimer. 



With Six Plates. 



