J. A. KITCHING 



Figure I. Effects of hydrostatic pressure on the suctorian Discophyra 

 piriformis*. The specimen shown was subjected to increasing pressures step 

 by step, with from 10 to 20 min. at each step. The drawings illustrate the 

 condition attained near the end of each period of exposure, when any further 

 change was very slow. The drawings have been traced from photographs. 



# This species is very close to D. collini (Root) and possibly identical with it. 



200 



