GENERAL FEATURES OF WATER EXCHANGES 



181 



Hour 

 Fig. 103. Course of relative water load (% of initial load) after recovery from 

 excess began, in diverse species of invertebrate animals. Zoothamnium put from 0.005 M 

 NaCN into fresh water ; initial AW + 38 ; basal body volume 1.8 x 10"® ml. ; data of 

 Kitching ('38, p. 145). Caudina put from 60 per cent sea water into normal sea water; 

 initial AW + 15; body weight 27 gm.; 22° C; data of Koizumi ('32, p. 277). Arbacia 

 egg put from 60 per cent sea water into normal sea water, initial AW + 52 ; average for 

 6 individuals, body volume 20.3x10-8 ml.; 21° C; data of Lucke et al. ('31, p. 416). 

 Phascolosoma put from 60 per cent sea water into normal sea water, initial AW + 44 ; 

 average for 5 individuals, AF, of body weight 1.9 gm. each; 24° C; additional data of 

 Adolph ('36b). 



Fig. 104. Course of relative water load (in % of initial load) after drinking was 

 allowed to begin following the periods of privation. Initial deficits of weight were 4 

 to 8% of Bo. One test in each of 5 species; Burro, Adolph and Dill ( '38) ; Dog, Adolph 

 ('39a); Eat, new data; Man, new data; Frog, Adolph ('39b). 



