86 



bulletin: museum of comparative zoology. 



the last two hours of the flood, veering again to the eastward shortly 

 before high water. 



There was no bottom current at Station 2, and inasmuch as that 

 station was occupied at the mid-ebb, when the bottom current further 



N 



s. 



Nf 



kS' 



\ •*-"' 



s 



25 



S 

 27 



N 



s 



38 



s 



45 



"-A 



Fig. 38. — Currents, Stations 1, 4, 5, 6, 7, 8, 9, 11, 14, 25, 27, 38, 43. Surface 



current- > ; bottom current > . The strength of the current 



is represented by the length of the arrows, 3 cm. = 1 knot per hour. 



within the Bay attains considerable velocity, its absence is no doubt 

 to be explained by the fact that the bottom here is an isolated pocket 

 some^twenty fathoms deeper than its enclosing sill, with a consequent 



