OF VITAL PHENOMENA 99 



fresh water fish (pike, muskalonge) are impermeable to salts 

 and also to water. If Fundulus eggs are taken from the mother 

 or from the sea water in which they are laid, they neither swell 

 nor lose their salts. The fish that develop from these eggs are 

 permeable to water, but there is evidence to indicate that except 

 for the gut and kidneys they are impermeable to salts (Sumner, 

 1905 and 1907, and G. G. Scott, 1913, a and b). 



