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BULLETIN OF THE BUREAU OF FISHERIES 
continent it occurs in numbers at San Diego, Calif., in the bays, but rather infre- 
quently outside (Esterly, 1905). On the other, it is reported from the Gulf coast of 
Louisiana (Foster, 1904), and is a dominant copepod in sheltered inlets and brackish 
ponds at Woods Hole. It is abundant, also, in the open water in that neighborhood, 
andVecorded from the Gulf Stream off Marthas Vineyard (Wheeler, 1901; Sharpe, 
1911). Cape Cod seems the northerly boundary to its presence in numbers, for 
although Wheeler (1901) reports it from Plymouth Harbor on the southern shore of 
Massachusetts Bay (this is the only gulf of Maine record), none of the Grampus, 
Albatross, or Halcyon gatherings in the gulf have contained it. McMurrich did not 
detect it at St. Andrews, nor has it been found in Canadian waters farther east or 
north. 
Aetidius armatus Brady 
Dr. C. B. Wilson contributes the following on the faunistic status of Ae. armatus: 
This species is quite cosmopolitan and has a wide distribution throughout the northern Atlantic, 
Pacific, and Indian Oceans. It is widely distributed in the northern fauna, but nowhere occurs in 
any numbers. Farran (1910) has reported it as a characteristic inhabitant of the lower layers of 
the northeast Atlantic off the coast of Ireland and Scotland. Carl With (1915), in his report on 
the copepods of the Danish Ingolf expedition, said that it was found in deep water, probably as a 
member of the Atlantic fauna, in the Iceland-Faroe channel, Denmark, and Davis Straits. It has 
also been taken in the North Sea and in several of the Norwegian fjords, and was included in the 
list published by Esterly (1905) of copepods found in the San Diego region off the coast of southern 
California. 
In the summer of 1915 the Canadian fisheries expedition took it in small num- 
bers in the deep oceanic triangle off the mouth of the Laurentian channel, between the 
Scotian and Newfoundland Banks (two stations), and outside the continental edge 
off Cape Sable (Willey, 1919). 
It has not been recorded previously from the Gulf of Maine, but the spring, 
summer, and autumn cruises of 1915 and of 1920 yielded odd specimens of it at eight 
stations — one for March, three for April, two for May, one for August, and one for 
October. It has not been reported at Woods Hole. 
Although this species is evidently only a rare stray in the Gulf of Maine (at most 
it amounted to 1 per cent of the copepods, with a maximum frequency of 87 individ- 
uals per square meter of sea area) the locations of the captures are of interest, all being 
either in the peripheral belt of the gulf, with a preponderance in its eastern side, or 
over the continental edge. A distribution of this sort (fig. 62), which parallels the 
dominant counterclockwise eddy of the gulf, indicates that the species is an immi- 
grant in the gulf from the open Atlantic and not endemic there. The fact that all 
but one of the records within the gulf were in hauls shallower than 100 meters sug- 
gests that it enters in the upper layers and across Browns Bank, not along the bottom 
of the eastern channel ; but it tends to keep at some little depth, for it was not de- 
tected in any of the surface hauls from February to May, 1920, even at the 
stations where it occurred in the verticals. 
Anomalocera pattersoni Brady 
This beautiful bluish green or Prussian blue calanoid is generally distributed over 
the North Atlantic between latitudes 36 and 67° N., in the Mediterranean and in the 
North Sea and English Channel (Giesbrecht, 1892; Brady, 1878-1880; T. Scott, 
