PLANKTON OF THE GULF OF MAINE 295 
In the last instance there were 7 per cent of this species in a very scanty catch of 
copepods made with the open net towing horizontally at 150-0 meters. 
It will be noted that the dates of these offshore captures do not correspond 
with the seasonal periodicity of the species at St. Andrews, but with a species as 
rare as this is out at sea it is largely a matter of luck whether any given haul chances 
to pick it up, and if the catch of other copepods be large, it is equally a matter of luck 
whether the particular sample of the tow examined chances to contain it. 
T'ortanus discaudatus is thus so strictly neritic in the gulf (decidedly more so than 
in the Gulf of St. Lawrence, where it is widespread over the shoal southern part) that 
it is hardly a factor at all in the offshore plankton, but probably it enters regularly 
into the diet of the small herring and other young fishes among the islands and in the 
harbors of the gulf, judging from its abundance at St. Andrews. 
Undeuclieeta major Griesforeclit 
This species is probably worldwide in temperate and tropic latitudes in the 
oceanic basins. It has been recorded off the west coast of Ireland in the north 
and from several stations below the Equator down to 40° S., 35° E., off South Africa 
in the south. It was originally described from the central Pacific and has since been 
taken off southern California (Giesbrecht, 1895) and at San Diego (Esterly, 1905) 
in that ocean. U. major has not yet been found in the Mediterranean but has been 
reported from the Indian Ocean (van Breemen, 1908) and among the Malay Archi- 
pelago (A. Scott, 1909). 
Previous records for this species off the Atlantic coast of North America are 
one station outside the continental edge off New Jersey, in July, 1913 (Bigelow, 1915, 
p. 287, station 10071), and three Canadian fisheries stations in July, 1915 — one out- 
side the continental edge off La Have Bank, one at the same relative location somewhat 
farther east off Banquereau Bank, and the third in the oceanic basin off the mouth 
of the Laurentian channel between Sable Island Bank and the Newfoundland Banks 
(Willey, 1919). To these Dr. C. B. Wilson’s table (p. 299) adds two vertical hauls 
in the Gulf of Maine — one of them on Browns Bank (March 13, 1920, station 20072) 
and the other on German Bank (April 15 of that year, station 20103). In each 
instance there were about 10 specimens in the catch, being at the rate of about 50 
per square meter. 
In the Gulf of Maine this copepod is one of the rarest of strays from the oceanic 
basin offshore, locally interesting when it occurs as an indicator of the prevailing 
indraught. Not having been taken farther in than German Bank, it may be assumed 
to be shorter-lived in the gulf than the species of Eucheirella, Pleuromamma, or 
Rhincalanus, which are similarly exotic and immigrant in the gulf. 
Undeuclieeta minor Giesbreclit 
The distribution of this species parallels that of TJ. major and it is equally 
oceanic. In the North Atlantic it has been reported as far north as the Faroe- 
Shetland channel (lat. 61° 20' N.) and west of Ireland; as far south as latitude 35° 
(Wolfenden, 1911; With, 1915); it is known from the central Pacific and from off 
