50 WESLEY R. COE. 



EXPLANATION OF PLATE I. 



FIG. i. Nectonermertes mirabilis Verrill. Mature male, with well-developed 

 tentacles and upwards of fifteen pairs of spermaries (sp), situated on the ventro- 

 lateral borders of the head; dg, dorsal ganglion of brain; In, lateral nerve; cv, 

 cephalic blood vessel; mv, median blood vessel; Iv, lateral blood vessel. X 6. 



FIG. 2. Female of same species, with from sixteen to nineteen ovaries (ov) 

 on each side of body. Each ovary contains but one large ovum, or sometimes two; 

 br, brain; ps, proboscis sheath. X 6. 



