254 
BULLETIN OF THE BUREAU OF FISHERIES 
found it at 76 per cent of all the stations east and north of Nantucket in the summer 
of 1913 and at 60 per cent of the July-August stations of 1914. The year 1915 
yielded M. lucens in the vertical hauls at 58 per cent of the stations right through 
the season, irrespective of locality in the gulf (table, p. 297), and 1920 and 1921 were 
the best years, with M. lucens occurring at 84 to 85 per cent of the stations, both 
for the spring months and for December and January. In addition to the captures 
of this species on the recent cruises of the Grampus, Albatross, and Halcyon, Wheeler 
(1901, p. 176, as “ M. hibernica”) describes it as very common in Plymouth Harbor, 
Mass., in August, 1899, while Dr. A. G. Huntsman (Willey, 1919) and Dr. J. P. 
McMurrich 40 have taken it frequently in the neighborhood of St. Andrews. 
Plotting the stations at which M. lucens has and has not been taken (fig. 77) 
shows that it occurs over the whole extent of the Gulf of Maine, on the offshore 
banks as well as inshore, across the whole breadth of the shelf off Marthas Vine- 
yard, and along the continental slope; and although we failed to find it in the 
harbors of Gloucester, Rockport, Battery, or Portland during July and August, 
1912, its presence in Plymouth Harbor and at St. Andrews proves that it inhabits 
estuarine and inclosed waters as well as the open sea. The rather confused picture 
presented by the chart of distribution is simplified if the records be classed as summer- 
autumn and winter-spring, for all the years combined, and if the gulf be divided 
as follows: 
1. Coastal zone out to 150 meters, Cape Cod to Grand Manan. Summer- 
autumn, present at 53 per cent of the stations; winter-spring, present at 70 per cent 
of the stations. (In the Massachusetts Bay region it was present at 77 per cent 
of the summer-autumn stations.) 
2. Off Lurcher Shoal. Occurred at all the stations, both summer-autumn and 
winter-spring. 
3. Coastal banks west of Nova Scotia, out to German Bank. Occurred at all 
the stations, both summer-autumn and winter-spring. 
4. The basin in general, west of longitude 68° 30'. Summer-autumn, at 56 per 
cent of the stations; winter-spring, at 73 per cent. 
5. Basin in general, east of longitude 68° 31' W, including the Fundy Deep. 
Summer-autumn, 75 per cent of the stations; winter-spring, 75 per cent. 
6. Northern channel. Occurred at all the three stations for which the copepods 
have been listed, spring and summer. 
7. Browns Bank. Occurred at one of two stations in summer, and at the two 
spring stations for which the copepods have been listed. 
8. Eastern channel. Occurred at all the stations, four in number, for which 
copepods have been listed, summer as well as spring. 
9. Eastern half of Georges Bank, east of longitude 68° W. Present at one and 
absent at one summer station; present at all five spring stations. 
10. Georges Bank west of longitude 68° W, and continental shelf off Marthas 
Vineyard and Nantucket. Present at three of eight summer-autumn stations for 
which the copepods have been listed and at one station in July, 1916; present at 
all three winter-spring stations. 
46 In his unpublished lists of the plankton for St. Andrews. 
