No. 10.—Oceanography and Plankton of Massachusetts Bay and 
adjacent waters, November, 1912-May, 1913. 
By Henry B. BIGELow. 
CONTENTS. 
PAGE.® 
Introduction : : ; ; 2 er 35, 
Temperature and Srey Baath a Ee ee : , eee 
Temperature and salinity north of Cape Ann, March dea hac : th ee 
_ Temperature and salinity on Georges Bank . ; : ; ; 24) OOS 
~ General discussion ; : : : : TE AOG 
Plankton notes. : ‘ : . 403 
List of copepods By C.O.Esterly ... 2 : : : . 409 
List of hyperiid amphipods . ! ; : F : : ? are | 
List of euphausiids ; ; : ‘ : f ; . 410 
Plankton from Georges Bank ! ‘ ‘ : . 414 
Table of temperatures and salinities, Blue Wine Siaticins : . . 416 
Table of temperatures and salinities, W. W. Welsh Stations : OE hie 
| Table of temperatures and salinities, Massachusetts Bay to Georges 
| Bank ; : i , , : ; : $ ; . , 419 
| INTRODUCTION. 
Durine the winter and early spring of 1912-1913 the Bureau of 
Fisheries Steamer BLUE WING carried on oceanographic investigations 
in Massachusetts Bay, under my supervision, continuing the work of 
the Grameus during the summer of 1912 (Bull. M. C. Z., 1914, 58, 
p. 29-148). It was planned to make a trip every two weeks to a 
locality some eight miles south of Gloucester, in 35-40 fathoms; and 
| also a few visits to Ipswich Bay, and to the waters off Cape Ann; but 
the frequent gales which made the season an exceptionally rough one 
imterfered more or less with the program. This work was supple- 
| mented by Mr. W. W. Welsh, of the Bureau of Fisheries, who took 
temperatures, water samples, and tows at 32 stations, chiefly north of 
Cape Ann, during March, April, and May, while investigating the 
‘spawning habits of the coast schools of haddock. And a few tempera- 
tures, water samples, and tows were also taken on George’s Bank, by 
Mr. W. F. Clapp, of the Museum of Comparative Zoélogy, and by 
ie Douthart, of the Bureau of Fisheries. 
