342 LOUIS M. HICKERNELL. 



PLATE II. 



FIG. 8. Section of brain of P. roseola. Normal active animal. Leitz oc. 8, 

 obj. 2mm. 



FIG. 9. Section of brain of a rotifer which was kept in an evacuated desiccator 

 for fourteen days previous to the time of fixation. Leitz oc. 8, obj. 2mm. 



FIG. 10. Section of brain of a rotifer which was dried twenty-four hours, put in 

 water for one hour and then killed. Leitz oc. 8, obj. 2mm. 



FIG. ii. Section of foot gland cells from a normal active animal. Leitz oc. 12, 

 obj. 2 mm. 



FIG. 12. Section of foot gland ells of a rotifer which was kept in an evacuated 

 desiccator for fourteen days previous to the time of fixation. Leitz oc. 12, obj. 2mm. 



FIG. 13. Section of foot gland cells from an animal kept fourteen days in an 

 evacuated desiccator and then placed in water for one and one fourth hours previous 

 to fixation. Leitz oc. 12, obj. 2 mm. 



FIG. 14. Section of procambium cell from a germinating corn embryo. Leitz 

 oc. 8, obj. 2mm. 



FIG. 15. Section of procambium cell from a partially dried corn embryo. Leitz 

 oc. 8, obj. 2mm. 



FIG. 1 6. Section of procambium cell from a corn embryo dried for a month at 

 room temperature. Leitz oc. 8, obj. 2 mm. 



