No. 2. — Explorations in the Gulf of Maine, July and August, 1912, 

 by the V. S. Fisheries Schooner Grampus. Oceanography and 



Notes on the Plankton. 



By Henry B. Bigelow. 



CONTENTS. 



Bav 



The cruise .... 

 Equipment and methods 

 Oceanography 



Surface temperature 



Temperature sections . 



Temperature at 25 fathoms 



Bottom temperatures . 



Temperature profiles 



Seasonal changes in Massachusetts 

 Salinity ..... 



Surface salinity 



Salinity at intermediate depths 



Salinity at 25 fathoms 



Salinity at 50 fathoms 



Bottom salinity 



Salinity profiles 

 Density 



Color .... 

 Transparency 

 Circulation in the Gulf of Maine 



Tidal currents 



Surface and bottom currents 



Circulation as shown by temperature and salinity 

 Comparison with previous records of temperature and 

 General considerations ..... 



Preliminary notes on the macroplankton . 

 List of fishes ....... 



Larval and postlarval stages 



Adult stages ...... 



List of copepods ...... 



Distribution of the more important plankton species 



Calanus finmarchicus ..... 



Euchaeta norvegica ..... 



Anamalocera pattersoni .... 



salinity 



32 



35 



42 



43 



48 



54 



55 



56 



58 



62 



62 



64 



6S 



70 



70 



71 



76 



81 



82 



83 



83 



85 



87 



92 



95 



98 



107 



107 



111 



115 



117 



117 



118 



118 



