66 



bulletin: museum of comparative zoology. 



important, because of the peculiar temperature conditions which 

 characterized the last two. German Bank and Piatt's Bank bear the 

 same relation to each other in salinity that they do in temperature, 

 the former being colder and salter at the surface, warmer and fresher 

 at the bottom, than the latter. But while Jeffrey's Bank was inter- 



Fig. 22. — Salinity sections at 

 when the surface and bottom 



Stations 27, 28, 31, 32. Curves are dotted 

 salinities alone are known. 



mediate between the two in temperature, it had a lower salinity at all 

 ■depths than Piatt's Bank and it was fresher down to about thirty 

 fathoms than German Bank, showing the influence of fresh water 

 from the Penobscot. The increase in salinity with depth was very 

 slight on German Bank, the difference between surface and bottom 



