164 bulletin: museum of comparative zoology. 



Sagittae 



Pteropods and Heteropods .... 



Pelagic Coelenterates 



Quantitative Distribution of Plankton, 1914, 1915 

 Number of Copepods ..... 

 Annual Variation in Amount of Plankton 

 Microplankton . . . . . . • . 



Table of Stations 



Table of Temperatures, Salinities, and Densities . 



Table of Temperatures and Salinities at corresponding 



1912-1915 



Bibliography 



Explanation of the Plates. 



Introduction. 



In 1914 the summer cruise of the Grampus was planned to afford 

 a, general survey of the coast water, out to the 1000 fathom curve, 

 from Cape Cod to Halifax.^ 



Sailing from Gloucester on July 18, the first section was made across 

 the western end of Georges Bank, to the continental slope; we then 

 ran eastward, along the southern and southeastern edge of the Bank, 

 to longitude 66° 10' w. ; whence a second section was made across its 

 eastern part, to the basin of the Gulf of Maine. The third section 

 was from the eastern edge of the Bank across the deep Eastern 

 Channel, the Northern Channel, and the coastal bank, to Shelburne, 

 Nova Scotia. 



On July 27th the Grampus anchored some thirty miles off Shelburne, 

 in thirty fathoms of water, and measurements of the surface current 

 were taken hourly for twelve hours, covering an entire tide, ebb and 

 flood (p. 203) ; with occasional readings on the bottom. We then ran 

 offshore once more, via Roseway Bank and the basin southeast of it, 

 to the continental slope in longitude 63° 58'; thence to Halifax. 

 With orders to return to United States waters, owing to the European 

 war, the Grampus, on August 6th, sailed southward as far as the south- 

 western edge of Emerald Bank, then westward, toward the Gulf of 

 Maine, via Shelburne. 



Locating the Gulf of Maine stations at the same positions as those 

 of 1912 and 1913 (Plate 1), the Grampus proceeded from Woods Hole, 



1 For a summary of the Cruise of 1914, see Bigelow, (1914c). 



