BIGELOW: EXPLORATIONS OF THE COAST WATERS. 285 



than T. incrmis, but the records for 1912 (1914a, p. 412), 1914 (p. 

 282) and 1915 (Stations 10306, 10307, 10308, 10310, 10318) show 

 that it may be expected anywhere there, Hkewise on Brown's and 

 Georges Banks, in the Eastern Channel, and in the waters outside the 

 continental slope. Its absence in the cold coast water off Nova 

 Scotia is explained by its southern origin. Hansen (1915) records it 

 at two oceanic stations south of Marthas Vineyard. Our data, par- 

 ticularly its occurrence in 1915, when it was not detected until August, 

 suggest that it increases in numbers, and penetrates further and 

 further into the Gulf, as summer advances. 



The captures of Meganydiphanes norvegica in 1912, 1913, 1914, 

 and 1915 show that it may be expected anywhere in the Gulf of Maine 

 and in the cold water off southern Nova Scotia. The Grampus did 

 not find it in Massachusetts Bay in 1912, 1914, or 1915 but Hansen 

 (1915) records it there; and although we did not take it in any of the 

 oceanic hauls, he lists it in small numbers from many stations outside 

 the continental slope south of IVIarthas Vineyard, for the summers of 

 1880-1894, and once off the southern edge of Georges Bank. Off 

 this coast Meganyctiphanes appears to be most abundant near land, 

 though it also extends seaward to the zone of mixture between coastal 

 and Gulf Stream water, which agrees with its general occurrence on 

 the other side of the north Atlantic (Kramp, 1913; Tattersall, 1911). 

 But while in European waters it is generally most abundant in regions 

 where the depth is as great as 150 fathoms (Holt & Tattersall, 1905; 

 Tattersall, 1911; Kramp, 1913), in the Gulf of Maine it often swarms 

 in the shallow water -of harbors and bays. 



Nematoscelis and Euphausia are typical oceanic species (Holt & 

 Tattersall, 1905; Tattersall, 1911; Kramp, 1911). The former Was 

 taken once in 1912 (1914b, p. 411); and in 1914 it was encountered only 

 twice in that part of the Gulf covered by previous cruises (1914a, 1915). 

 But it likewise occurred in small numbers in the southeast corner of 

 the Gulf, in the Eastern Channel, off the southeast face of Georges 

 Bank, on Brown's Bank, and on Le Have Bank. It was abundant in 

 the deep hauls over the slope south of the latter, both in 1914 (p. 282) 

 and in 1915 (Station 10295, p. 283). Hansen (1915) does not record 

 Nematoscelis from the Gulf of Maine, from Georges Bank nor indeed 

 from the continental shelf north and east of Cape Cod; but he lists 

 it from many localities over the continental slope, particularly south 

 of Marthas Vineyard. 



Euphausia krohnii is apparently even more oceanic in our waters 

 than Nematoscelis, for it was only in the Eastern Channel and over 



