PLANKTON OP THE GULP OP MAINE 
147 
and in the Eastern Channel (station 10227) in July, 1914. As has been noted above 
(p. 134), it occurred in abundance over the continental slope southeast of Cape Sable 
(station 10233) a few days later. We also found it at this general locality on June 
24, 1915, which, with one record at the same relative position off Marthas Vineyard 
on August 26, 1914 (station 10261), completes the list for the Gulf of Maine cruises. 
All the records given by Hansen (1915) are from well outside the continental 
edge, though he lists so many captures of E. Tcrohnii that the species is evidently 
one of the commonest of euphausiids off the slope abreast of Cape Cod and at least 
as far east as off La Have Bank, and perhaps still farther. Thus, on the basis of 
actual record, Euphausia is hardly to be expected inside the outer rim of the Gulf of 
Maine except as a straggler from the warmer Atlantic. 
Meganyctipliaiies norvegica (M. Bars) 79 
While this brilliantly phosphorescent shrimp, the largest and most familiar of all 
euphausiids in the Gulf of Maine, has not appeared as regularly in our tow nets in most 
parts of the Gulf as has Thysanoessa inermis, it occurs locally in such abundance 
that it is far more important economically than the latter. The locality records 
for Meganyctiphanes are distributed generally enough to show that it may be ex- 
pected anywhere within the gulf north of the Cape Cod-Cape Sable line during 
the summer and early autumn, both in the deep basin and along shore. Nor does 
the chart (fig. 53) show any apparent concentration in distribution in one or the 
other side of the gulf at that season, if the considerable number of stations which 
the Grampus has occupied in the Massachusetts Bay region be allowed for. 
I have just mentioned (p. 135) the swarms of Meganyctiphanes that regularly 
appear during the warm months about St. Andrews and in Eastport Harbor, where 
numbers of these shrimps can usually be seen darting to and fro at the surface on 
almost any calm day in August. It seems that this region of violent tidal currents 
is the only part of the Gulf of Maine where Meganyctiphanes regularly enters the 
estuaries, but it appeared in the shallows at the head of Frenchmans Bay for a brief 
period in June, 1923, when a number were collected by Dr. IJlric Dahlgren. Me- 
ganyctiphanes appeared there again in abundance in the summer of 1924 (Dahlgren, 
1925, has already reported these incursions). 
We have never taken it in our tow nettings inside the off-lying islands west or 
south of this at any season, and although neither comparatively shoal water, per se, 
nor the general neighborhood of the coast is any bar to its presence — witness its 
occurrence in Massachusetts Bay and in the Eastport-St. Andrews region — most of 
the Grampus, Albatross, and Halcyon records for it have been from the basin of the 
gulf outside the 100-meter contour. We have found it only once on German Bank 
(August 14, 1912, station 10029), once on Browns Bank (July 24, 1914, station 10228) 
and twice on Georges Bank (station 10223, July 23, 1914, and station 20124, May, 
17, 1920), although it has been taken in the Woods Hole region and in shoal water 
south of Long Island (Hansen, 1915). 
78 For station records for this species from 1912 to 1916, see Bigelow, 1914, p. 118; 1914a, p. 411; 1915, p. 273; 1917, p. 282; and 1922, 
p. 133. During the spring of 1920 it was taken at stations 20049, 20052, 20053 , 20054, 20055, 20056, 20057, 20076, 20079, 20081, 20087, 
20088, 20093, 20097, 20098, 20100, 20102, 2C113, 20114, 20115, 20122, 20126, and 20127. In December-March ,1920-1921 ,it was taken 
at stations 10490 ,10491, 10494 ,10497, 10499, 10500, 10502, 10507 ,10509, and 10510. 
