BUDDING OF ANNELIDS, 



235 



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 



FIG. 156. 



FIG. 157. 



Fig. 156 Clymenella torquata. After Verrill. 



Fig. \yi.-Amphilrite cirrata, enlarged twice. ft, branchia ; c, uncini, enlarged 500 

 diameters. After Holmgren. 



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 Syllis and allies certain long, slender processes of the 



