MARINE MOLLUSKS — MACGINITIE 

 Table^I. — Dredging^stations — Continued 



63 



and to the surging currents that sweep through the Pass, stirring up 

 the mud. 



During the winter of 1949-1950, sampling and dredging were carried 

 on through the ice, the dredging powered by means of dog teams. 

 (For details of methods, see G. E. MacGinitie, 1955, pp. 53-57.) The 

 results obtained were somewhat disappointing in that storms in early 

 autumn had desposited several inches of mud over the ocean floor out 

 for a distance of an undetermined number of miles — farther than the 

 solid ice extended, so that it was impossible to dredge in a rubble zone 

 that had not been blanketed with mud (see stations 48-62 in table 1). 

 Some of the mud-dwelling pelecypods transported to the rubble zone 

 by the storms were able to become established in this blanket of mud. 



Trapping stations, not included in the following table, were main- 

 tained throughout the winter. At depths of 7, 21, 37, 64, and 80 feet, 

 holes through the ice were kept open and screen and wire-mesh traps, 

 usually baited, were kept on the ocean floor and inspected at intervals. 

 All of these trapping stations were on muddy bottom, with the 80-foot 

 hole at a distance of 1.8 miles from shore. 



