BUDDING OF ANNELIDS. 



in the fresh-water worm Nais, also in Syllis and Myrianida, 

 as well as in Filograna, Protula, etc. Autolytus, a com- 

 mon worm on the coast of New England, produces one gen- 

 eration by budding (parthenogenesis). There is, in fact, an 

 alternation of generations, an asexual Autolytus, giving 



Fio. 157. 



Fig. 156. Clymenella tnrqnata. After Verrill. 



Fig. \57.-Amphitrite cirrata, enlarged twice, b, branchia ; c, uncini, enlarged 500 

 diameters. After Malingren. 



rise to a brood of males and females, the sexual and asexual 

 forms being so unlike each other as to have been mistaken 

 for different species and even genera. 



In Fyllis and allies certain long, slender processes of the 



