VAN NAME: COMPOUND ASCIDIANS. 383 
Northeast Land; at various points on the Xorwegian coast, on the 
Murman coast, in the White Sea, in Davis Straits, on the coast of 
Greenland, and (on Packard's authority) on the Labrador coast and 
at Eastport, Maine. Sixty fathoms (in Davis Straits) is the greatest 
depth that Hartmeyer records. 
On the American coast this species is very common from about the 
latitude of Boston northward, though Boston is not its southern limit. 
It is represented in the Yale Collections by numerous specimens from 
the Banks of Newfoundland and southward along the coast to Cape 
Cod and beyond, and is recorded by \Yhiteaves (1901) from Prince 
Edward Island and the jNIingan Islands. At the latter place it was 
collected also by ^'errill. Verrill's types of albidum and luteolum were 
from Eastport, Maine. South of Boston it is less common, but a few 
miles off Chatham, Mass., at the southeastern angle of Cape Cod, it 
was dredged in quantity at Stations 964 to 979 (10 to 16 fathoms, sand, 
gravel, stones, August 30, 1881), and Station 371 (34.5 fathoms, coarse 
speckled sand, September 19, 1879). There is also a colony from 
Station 2079 (N. lat. 41° 13', W. long. 66° 19' 50", 75 fathoms, white 
sand) ; one from Station 751 (nine miles east of Great Point, Nantucket, 
Mass., 13 fathoms, September 15, 1875), and several from the most 
southerly of all the localities. Stations 762 to 767 (about 11 miles 
southwest of Gay Head, Mass., 16.5 to 18 fathoms, gravel and sand, 
September 20, 1875). In every other case where the writer has ex- 
amined supposed specimens from points south or west of Chatham, 
Mass., they have proved to be of another species (Didemnum lutarium, 
see p. 373). 
The greatest depths from which any of the specimens came are: 
Station 54B (off southeastern edge of Cashe's Ledge, Gulf of Maine, 
110 fathoms, mud, September 5, 1874) and Station 2459 (off New- 
foundland, N. lat. 46° 23', W. long. 52° 45', 88 fathoms, coarse gray 
sand, July 2, 1885). The specimen from Station 2079 (see above) is 
from 75 fathoms; another from Station 2699 (off Xewfoimdland, X. 
lat. 45° 04', W. long. 55° 23') is from 72 fathoms. In the Bay of 
Fundy and about Eastport, Maine, according to Professor Verrill 
(1871a), it occurs from low-water mark to from SO to 100 fathoms; 
in the southern part of its range it appears not to occur along the shore 
but always in water at least a few fathoms deep. 
The specimens identified by Herdman (1886) in the Challenger 
Reports with Leptoclinum albidum Verrill, or considered varieties of 
