[171] CEPHALOPODS OF NORTHEASTERN COAST OF AMERICA. 
Young specimens, with the mantle less than 12™™ in length, can 
scarcely be distinguished sexually, by external characters. Such speci- 
mens are not easily distinguished from the young of Rossia Hyatti, of 
similar size. 
One of the original specimens (2) measured, from the base of the arms 
to the end of the body, 46™™; length of body, 31; of head, 15; breadth of 
- body, 22; of head, 23; length of fins, 20; of their insertion, 16; breadth 
of fins, 10; front edge of fin to edge of mantle, 2.5; length of free portion 
of dorsal arms, 16; of second pair, 17; of third pair, 20; of ventrals, 15; 
of tentacular arms, 25; breadth of dorsal arms at base, 3; of second 
pair, 3; of third, 3.5; of ventrals, 3.5; of tentacular arms, 3.5; of the 
terminal portion, 3.75; its length, 10; diameter of largest suckers of 
sessile arms, .8; length of free portion of siphon, 7™™. 
The pen is but little developed, small and thin, much shorter than the 
mantle. The shaft is narrow; the blade increases in breadth rather 
abruptly, and is somewhat shorter than the shaft; its ee portion 
is very thin, with the edge ill-defined. 
One of the specimens (No. 16), taken by Mr. Agassiz in 257 Bas 
is a young female differing somewhat from the others in having the 
arms shorter, with the suckers more crowded, so that they apparently 
form more than two rows. Possibly this should be referred to R. Hyatti 
Verrill. Its backis smooth. All three specimens from this same region 
differ somewhat from those taken farther north, in shallower water, in 
having larger eyes and shorter and stouter arms. 
This has been taken by the dredging parties of the U. S. Fish Com- 
mission, in the trawl-net, at various localities, in 1877, 1878, and 1879, 
in 45 to 110 fathoms, off Massachusetts Bay, in Massachusetts Bay, off 
Cape Cod, off Cape Sable, N. S., and off Halifax. It has been brought 
in by the fishermen of Gloucester, Mass., from the banks off Nova Sco- 
tia and Newfoundland. It was also trawled in some numbers, and of 
both sexes, by the U.S. Fish Commission, on the “ Fish Hawk,” in 1880, 
off Newport, R. I., in 155 to 365 fathoms; and in November, 1880, by 
Lieut. Z. L. Tanner, on the “ Fish Hawk,” off the mouth of Chesapeake 
Bay, in 157 fathoms; and by Mr. Agassiz, on the “ Blake,” in 233-260 
fathoms, and as far south as lat. 32° 33’ 15’. It has also been dredged, 
in 1881, by the U. S. Fish Commission, at several stations, about 100 miles 
southward of Martha’s Vineyard, in 160-458 fathoms (fifty-two speci- 
mens). The eggs, which are like those of R. Hyatti, were taken at 
895, 897, 939, 1033. 
This species very closely resembles the Rossia glaucopis Lovén, of 
Northern Europe, as figured by G. O. Sars. The latter is, however, 
more papillose, and has smaller eyes and head, if correctly figured. 
Some of the specimens taken this year resemble Sar’s figure more than 
any of those previously observed. It is possible, therefore, that a larger 
series of European specimens would show that they are of the same 
species. 
