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BULLETIN OF THE BUREAU OF FISHERIES 
the continental slope have been in temperatures ranging from about 6 to 10.8° 
(station 10061). 73 
The salinities have been even higher for S. lyra than for S. maxima, ranging 
from 34.3 per mille to about 35 per mille within the gulf and about the same along 
the slope outside. Thus, on the whole, our observations corroborate Huntsman’s 
(1919, p. 432) conclusion that S. lyra is associated with rather higher temperatures 
than is S. maxima, though equally cosmopolitan in the mid-depths of the high seas. 
Sagitta hexaptera D’Orbigny 
The claim of S. hexaptera to mention here rests on a single specimen, since lost, 
taken near Lurcher Shoal on August 12, 1914, in a tow from 100 meters (Bigelow, 
1917, p. 297). Outside the gulf it is a regular inhabitant of the intermediate strata 
of the oceanic basin, occurring at all the outermost Canadian stations (Huntsman, 
1919, p. 423) and at one of our own (station 20044). We likewise found it over 
the slope abreast of Delaware and Chesapeake Bays in July, 1913 (Bigelow, 1915, 
p. 297). Huntsman (1919, p. 424) has described its faunistic status, saying that it 
belongs to the Gulf Stream coming up from the south off the northeastern American 
coast, not to the cold boreal water coming down from the north. In the former 
it is characteristic of the intermediate depths from 100 to 200 meters, and it occurs 
so regularly 50 to 60 miles out beyond the continental edge that careful watch 
should be kept for it within the Gulf of Maine as an indicator of tropical water. 
Eukrolmia hamata Mobius 
The general status of this glass worm has been discussed in an earlier chapter 
(p. 63) as an immigrant in the Gulf of Maine. Only a few notes need be added 
here on the actual record of its local occurrences. Eukrohnia being, beyond ques- 
tion, a creature of the deeper strata of water in these latitudes, the precise depths 
of the captures are of interest. So far as I can learn it has only once been found 
on the surface within the limits of the gulf — viz, a single specimen recorded by 
Huntsman (1919, p. 476) from Friar Roads in the Bay of Fundy. No doubt, as 
he suggests, vertical currents were responsible for bringing this lone Eukrohnia up 
to the surface there from its normal habitat deeper down, the local tides being 
“ of such magnitude that the water forms whirlpools and the boiling up of the deep 
water to the surface can be seen constantly.” At this locality three Eukrohnia were 
also taken at 20 meters on the same occasion. For the open gulf our shoalest 
records for it are from 40 meters (stations 10095 on German Bank, 10099 close to 
Mount Desert Island, and 10102 off Penobscot Bay, one or two examples at each, 
all in August, 1913, and several taken near the eastern Maine coast on March 22, 
1920, station 20080), 50 meters (one specimen, station 10497, near Mount Desert 
Rock, January 1, 1921, and odd specimens from Browns Bank, June 24, 1915, station 
10296), and 60 meters (off Cape Elizabeth, December 30, 1920, station 10494; 
near Lurcher Shoal; and over the deep trough to the northeast on August 12 and 
13, 1913, at stations 10096 and 10097). 
33 At station 10295 the specimens may have come from water as cold as 4.9°, but equally from the warmer strata penetrated 
by the net on its journey down and up. 
