A. EF. Verrill—Dredgings on the Coast of New England. 38 
n 
such as worms, naked mollusks, ascidians, polyps etc. Accord- 
ingly, Mr. J. H. Emerton of Salem was employed during the 
Experience, during the past summer has shown that these instruments aoe 
a standard instr 
re several are used, and the error, = pst : 
instrument sh = pe every observation recorded 
nt should be numbered or lettered, and wi ‘ 
there should be a designation of the particular instrument used, otherwise errors 
of several degrees may occur. 
