•J- 



PROCEEDINGS OP THE AMERICAN ACADKMY. 



Ill/,— 



iv/. 



Vl/:' 



VII. 



VIII: 



Fig. 1. Dorsal view of the anterior part of tlie body of Glossfphonia para- 

 sitica Say (Clepsine holhnsis Whitman), showing in the right half of the figure the 

 nervous system ; in the left half, the lymph system (stippled). The pear-shaped 

 dark hodies shown on certain rinirs are dorsal sense organs. '/., st mi i p of a nerve 

 branch which innervates dorsal Bense organs on all three rings of a Bomite. 

 nph'po., ney>hropore. va.t, transverse lymph vessel. Somite limits are indicated 

 by roman numerals, at the lefl of the figure (I.-VII.'), according to Whitman's 

 view ; at the right (I. -VIII), according to the view of the writer. After Whit- 

 man ('02), simplified. 



