292 bulletin: museum of comparative zoology. 



CalantLS hyperborens belongs fundamentally to the Arctic community 

 (Farran, 1910, Murray and Hjort, 1912). Its occurrence in the Gulf 

 of Maine agrees with its general distribution in so far as it was most 

 abundant at the season (May and June) when northern water is at its 

 maximum there; and its fluctuations off southern Nova Scotia, where 

 it was about as numerous as C. finmarchiciis in June, lacking in August, 

 correspond with those of the Cabot Current. Hence, its numbers in 

 the Gulf must receive annual accessions from the North. But its 

 sporadic appearance here and there in the Gulf, at all seasons, together 

 with the fact that even in spring it was rare or absent just where 

 Cabot Current water was most in evidence (Stations 10270-10272), 

 suggests that it may also be endemic in the Gulf of Maine. 



Mctridia lucens was practically universal in the Gulf of Maine in 



1914, as in past years, though never abundant there. It was as gen- 

 erally distributed over the Gulf throughout the spring and summer in 



1915, though much less numerous in that year when it was detected 

 at onlv about half the stations.^ 



In 1914 it occurred in several surface- hauls, instead of being 

 restricted to depths of 25 meters or more, as was the case the year 

 before (1915, p. 295). 



Euchaeta norvegica played much the same role in the Gulf in 1914 

 and 1915 as in 1912 and 1913 (Fig. 88), occurring in most horizontal 

 hauls deeper than 100 meters, sporadically at higher levels; and 

 even on the surface both in the Gulf (Stations 10247, 10254, 10256) 

 and off Shelburne (Station 10294). But although the surface hauls 

 have occasionally yielded considerable numbers of Euchaeta (e. g., 

 Station 10032 in 1912; 1914a, p. 104) it is f^r more numerous and 

 regular in its occurrence in the depths of the Gulf, of which it is one 

 of the most characteristic inhabitants; as it is of the mid-layers of 

 the Norwegian Sea (Gran, 1902); and almost all the records for 

 Euchaeta have been from outside the 100 meter curve, no matter 

 at what depth the specimens were taken. As a rule Euchaeta occurs 

 in small numbers only, so much so that it seldom appears in the ver- 

 tical hauls. But it was abundant in the northeast corner of the Gulf 

 both in 1914 and in 1915 (p. 250).^ 



Temora longicornis and Anomalocera pattersoni have markedly dim- 

 inished in the Gulf of Maine since 1913 (p. 290). The latter, a species 

 so conspicuous, both in life and after preservation, that it is not likely 



1 Melridia lucens occurred at the following Stations in 1915: 10270, 10272. 10273, 1027S, 

 10279, 10282. 10283, 10284, 10286, 10294, 10295, 10299, 10304, 10306, 10307, 10308, 10309, 

 10311, 10314, 10315, 10318, 10324, 10325. 



2 In 1915 Euchaeta was taken at Stations 10270, 10273, 10276, 10282, 10283, 10286, 10293, 

 10294, 10304, 10306, 10307, 10309, 10310. 



