LEONARD MUSCATINE 



257 



Fig. 2. Arrangement of apparatus for rapid measurement of the reduced 

 weight of a sea anemone in sea water of known temperature and density. 

 The animal is suspended by a thin constantan wire hooked into its actino- 

 phorynx. 



Two groups of five normal anemones were placed into aerated 

 containers of twice-filtered sea water at 14.0^ ± 1.5^. One group 

 was continually illuminated by 200 ft. c. of fluorescent illumination 

 ( Champion— Warm White) while the other was kept continually 

 in darkness. Both groups were allowed to starve.^ The reduced 

 weight of each individual was measured (Fig. 2) at intervals of 

 four days or more and the sea water in all containers was renewed 

 weekly. Individuals in darkness were weighed in dim light. As 

 additional controls, two groups of five albino anemones were treated 

 in a manner identical to the normal svmbiotized anemones. Details 



^Fed anemones were unsatisfactory experimental animals. Erratic behavior ( e.g. pre- 

 mature egestion, failure to feed) interfered with attempts to control feeding. 



