NEMATOCYSTS OF ^IICROSTOMA. 



245 



TABLE I. 

 NEMATOCYSTS OF Microstoma NONE OR FEW. 



days with Hydra before they died without accepting any part of 

 Hydra. Specimen 16 is the most significant one of the table. 

 It was learned by observation that Microstoma could live in a 

 small vessel of spring water for about nine days without food. 

 Many died in less time under these conditions but none passed 

 1 Rather by gastric juices than by nematocysts. 



