PLATE 20 



Fig. 30. Surface isohaliues of the Coronado Island region for June, Ifill. 



Note. — The decimal part of the salinity is indicated for each isohaline in 

 plates 20-22, but to save space the 33. is omitted. 



Pig. 31. Isohalines at depth meters, in the Coronado Island region for 

 June, 1911. 



[320] 



