BUDDING OB' ANNELIDS. 



215 



in tlie 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 



Fis. 150. 



Fia. 151. 



5Mg. l^. — ClyjnemUa torquata. — After VerrUl. 



Wg. 15l.—Amphitrite cirraia, enlarged twice. 6, branchia ; c, unoini, enlarged 50C 

 diameters. — After MiiliDgreii. 



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

 fosms being so unlike each other as to have been mistaken, 

 for different species and even genera. 



Inj Syllis and allies certain long, slender processes of the 



