154 bulletin: museum of comparative zoology. 



parent was the air that the whole coast, from Cape Sable to Yarmouth, 

 was plainly visible, though we were nowhere within 20 miles of the land. 



We took surface temperature and water-samples close to Lurcher 

 Shoal light-ship on the 12th, and then stood across the mouth of the 

 Bay of Fundy to the Maine coast (Station 10098), making a Station 

 (10097) in the north end of the basin en route; and thence followed 

 the outer islands southward to Mt. Desert Rock (Station 10100). 

 The weather now grew foggy, and the Grampus crossed the mouth of 

 Penobscot Bay in the fog, passing close to Matinicus Island (Station 

 10101). Three stations were made between Monhegan and Cape 

 Ann, two in the trough west of Jeffrey's Ledge, and on August 15th 

 the Grampus returned to Gloucester. 



During the cruise oceanographical observations were taken at 50 sta- 

 tions; and, thanks to an ample supply of water-bottles, samples were 

 taken at three to five levels at every station. One hundred and sixty- 

 five tows were made with the various plankton nets; the quantitative 

 net was used at fifteen stations in the Gulf of Maine; the otter trawl 

 employed at ten stations. The distance sailed was about 2100 miles. 



The Grampus lay in Gloucester until the 20th, to refit; and on the 

 20th, sailed southward once more, in charge of Mr. Welsh, for a de- 

 tailed survey of the scallop beds, a report of which has already been 

 published by the U. S. Bureau of Fisheries (1914). 



EQUIPMENT AND METHODS. 



The general equipment of the Grampus has been described (1914a, 

 p. 35). In 1913 a second Ekman current-meter, several more Negretti 

 and Zambra reversing deep-sea thermometers, and two more stop- 

 cock water-bottles, were added ; the latter so arranged that any num- 

 ber could be used simultaneously, in series, on the wire rope, and 

 tripped by a messenger. The outfit was further enlarged by the 

 addition of a Helgoland "shear board" tow-net (Steuer, 1910, p. 131), 

 which proved to be most effective, a 1 -meter tow -net of the Michael 

 Sars pattern (Murray and Hjort, 1912), and a Lucas sounding machine. 

 On the other hand the Sigsbee water-bottle, which was unreliable, 

 was discarded and an otter trawl was substituted for the beam-trawl. 



The salinities listed below were all obtained by titration by the 

 ordinary method, and are probably correct to ± .02 of salinity. The 

 subsurface temperatures are reliable to =t.3°F; the surface tempera- 

 tures to =t.5°F (1914a, p. 40). All temperatures are Fahrenheit. 



