414 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
abundant along the coast of Nova Scotia and in the Bay of Fundy, 
where according to Professor Verrill it is found from low water to 80 
fathoms. It is also common along the coast of northern Xew Eng- 
land, and also at considerable distances from the shore where the 
water is not too deep. In the more southern parts of its range it 
occurs chiefly in water from 5 to 45 fathoms or more in depth. 
There are numerous specimens from the vicinity of Cape Ann and of 
the northern end of Cape Cod. Farther south it becomes more local 
in its distribution, but there are localities off Chatham, Mass., at the 
southeastern angle of Cape Cod, where it was found in great abun- 
dance and sometimes in large and flourishing colonies. These 
are: Stations 965 to 979 (a few miles S. E. of Chatham Lights, 15 to 
18 fathoms, sand, gravel, and stones, August 30, 1881). Other 
localities in the same region but farther offshore are: Station 371 (16 
miles off Chatham, X. lat. 41° 35.5', W. long. 69° 35', 34.5 fathoms, 
coarse speckled sand, September 19. 1879); and Station 984 (oft' 
Chatham, N. lat. 41° 31', AY. long. 69° 28', 33 fathoms, mud and sand, 
August 30, 1881), and farther to the southeast, Station 2081 (X. lat. 
41° 10' 20'', W. long. 66° 30' 20", 50 fathoms, sand, September 4, 
1883) and Station 2082 (X. lat. 41° 09' 50", W. long. 66° 31' 50", 
coarse yellow sand, September 4, 1883). 
It occurs sparingly in Xantucket and Vineyard Sounds. There are 
specimens from Station 629 (Xantucket Sound, 5.5 fathoms, sand, 
July 21, 1875) and Station 1203 (Menemsha Bight, Martha's Vineyard, 
8 fathoms, hard sand, August 7, 1887). Still farther south and west, 
it is more or less rare. There is a small and poor specimen from 
Station 797 (near Point Judith, R. I., 16.5 fathoms), which is of this 
species without very much doubt, and the writer feels certain of some 
from Station 775 (off the north end of Dutch Island, Xarragansett 
Bay, 12 fathoms, gravel, sand, and mud, August 6, 1880), and Station 
778 (near Fort Dumpling, Xarragansett Bay, 26 fathoms, gravel, sand, 
and broken shells, August 7,. 1880). There is also a jar containing 
numerous small and badly shrunken colonies, evidently in a degen- 
erated and not actively growing condition when collected, from U. S. F. 
C. Stations 762 to 767 (oft' Southwest Ledge, near Martha's Vineyard, 
Mass., Gay Head X. E. about 11 miles, 16.5 to 18 fathoms, gravel 
and sand, September 20, 1875). With the last-mentioned colonies are 
specimens of Tcfradidcmmnn alhidurn (Verrill), a species commonly 
found in company with A. glabrum on the coasts of northern X'^ew 
