BUDDING Of ANNELIDS. 



173 



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

 as well as in Filoyrana, Protula, etc. Autolytits, 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. 120. 



PIG. 121. 



Fig. WO.Clymenflla tprquata. After Verrill. 



Fig. \2\.Amphitrite cirrata, enlarged twice, ft, branchia ; c, uncini, enlarged 50C 

 diameters. After Malmgreii. 



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 



