20 



Papers from the Department of Marine Biology. 



Table 8 shows the rates of nerve-conduction in subumbrella tissue of 

 Cassiopea xamachana in Tortugas sea-water of Pg 8.1 to 8.2 diluted 

 with non-aerated distilled water of ?„ about 6 (H-ion concentration 

 0.9X10"^) at 29° C. The rate in undiluted sea-water is taken to be 

 100. The experiments were conducted at Tortugas, Florida, in June 

 and July 1916. 



Table 8. 

 [?.w. =sea-water. d.w. =distilled water. 1 



