BUDDING OF ANNELIDS. 173 
in the fresh-water worm Nais, also in Syllis and Myrianida, 
as wellas in Pilograna, 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 Aufolyéus, giving 
Fie. 120, 
Fig, 121. 
Fig. 120,—Clymenella torquata.—After Verrill. 
Fig. 121.—Amphitrite cirrata, enlarged twice. b, branchia; c, uncini, enlarged 50¢ 
diameters.—After Muligren. 
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 Syilis and allies certain long, slender processes of the 
