On the Nervous System of Cassiopea Xamachana. 



153 



the~end of the period of observation. This appears most clearly in 

 experiments in., which active and inactive specimens are compared 

 (fig. 10), while^the nearest approach to actual convergence is shown 

 in* the series in fc which activated and inactive specimens are compared 



(fig. 1). 



TABLE 8. Record for to 4 days. 



[Twenty disks to show the differences in loss of weight between activated and 



inactive half-disks.] 



The previous researches on inanition in invertebrates have dealt 

 with either the chemical or histological changes brought about by the 

 disturbances in normal metabolism caused by this condition, and need 

 not be reviewed in this connection. In general, it has been observed 

 that there is a shrinkage in size and frequent degeneration of the cells 

 of all parts of the body. The epithelial tissues in general have a tend- 



