412 bulletin: museum of comparative zoology. 



and west, from Cape Cod to German Bank; the stations of capture 

 being so located that it can not be said to have been absent from any 

 considerable part of the Gulf. And it was even found in water as 

 barren of plankton as the Grand Manan Channel (Station 10,035) 

 and Eastport Harbor {Loc. cit., p. 104). Few animals, except the 

 copepod Calanus, were more consistent in their occurrence than T. 

 inermis. It was most abundant north of Cape Ann in early July 

 (Station 10,011), and on German Bank in August (Station 10,030); 

 with minor centres of abundance off Penobscot Bay in August (Sta- 

 tion 10,038) and in the northeast corner of the gulf (Station 10,036). 



Meganyctiphancs norvegica was taken at nearly as many localities 

 as T. inermis (12, as against 14); and its distribution over the Gulf 

 was practically the same, except that we did not find it so regularly. 

 However, its occurrences are too uniformly distributed to suggest any 

 im.portant local restriction further than that it, like T. inermis, was 

 apparently not living in Massachusetts Bay. Meganyctiphancs was 

 most abundant on German Bank (Station 10,029) and in Eastport 

 Harbor, where it swarmed on the surface (Loc. cit., p. 104). Elsewhere 

 it was represented by a few specimens. 



Thysanocssa longicaudata was taken less often than either of the 

 preceding species, i. c, at six stations (10,019, 10,027, 10,028, 10,032, 

 10,036, 10,043), thus being widely distributed over the shore parts of 

 the Gulf, from Cape Cod to German Bank. But it was absent, so 

 far as our hauls show, from the water close to the coast, in striking 

 contrast to the abundance of Meganyctiphancs and Thysanoessa 

 inermis near land. The only place where we found it in numbers was 

 in the centre of the Gulf (Station 10,027), far from land. Elsewhere 

 it was represented by occasional specimens only. 



Thysanoessa gregaria was taken at the same number of stations 

 (10,019, 10,023, 10,027, 10,032, 10,043, 10,049), and usually in the haul 

 with T. longicaudata, the only station where the former was found and 

 not the latter being on Piatt's Bank (Station 10,023). But it was 

 most numerous near Mt. Desert Rock (Station 10,032) instead of fur- 

 ther off shore. In the other hauls there were only a few specimens. 



Nematoscelis megalops occurred in only one haul, off Mt. Desert 

 rock (Station 10,032 surface, a single specimen). 



When work was resumed in autumn, off Cape Ann, schizopods were 

 wholly absent, though the plankton was decidedly rich otherwise 

 (p. 403). And the only euphausiid taken all winter was a single 

 specimen of Thysanoessa longicaudata off Cape Ann, December 23. 

 But, as pointed out above (p. 408) swarms of euphausiids appeared 



