700 



THE AMERICAN NATURALIST 



[Vol. XL 



Nais tenuidentis n. sp. 



Prostomium blunt. Eyes absent. Di^^estive tract not differ- 

 entiated into esophagus or stomach, covered with many brownish 

 ^ glol)ules. Dorsal bundle be- 



^ ) posed of 1 capilliform, the 



T ] length (ISO /<) of wln'ch is 

 ' i^:r=(i i i approximately one half the 



sisting of 4 (3 in several a 

 rior l)undles) dee|)ly bifid s 

 both teeth being excecdi 



