443 



duce a new one by budding from the endocyst on the side of the 

 stomach. In Loxosoma, young resembling the adult, bud out like 

 polyps. 



Nitsche does not regard this budding process as an alternation 

 of generations, but states that in Polyzoa of the family Vesicu- 

 lariidae, this may occur, as in them some cystids form the stem, 

 and others (the zocecia) produce the eggs. 



The Polyzoa produce winter and summer eggs, the winter eggs, 

 called statoblasts, being protected by a hard shell. Fig. 188, after 



Hyatt, represents the winter egg of Pedt'natella magnified, with 

 spines. These winter eggs crowd the zooecia, and may be found 

 in them after the polypides have decayed. 



Grant first described the ciliated young of the Polyzoa. The 

 Swedish naturalists, Loven and Smitt, have described Fig. 189. 

 the development of the young Lepralia pallasiana, 

 which, after passing through a true morula condition, 

 issues from the egg as a flattened ciliated sphere with 

 a single band of l:\i-vr cilia >uiT«>iinding one end. 



Our figure (189) is copied from Claparede's memoir, 



'liatrly al't- r escaping from the vixg. After swimming 

 about for a while as a spherical ciliated larva, with a bunch of 

 larger cilia (flagellum) at one end, it elongates, looses its cilia and 



