A. EF. Verrill—Marine Fauna of North America. 209 
largest; the second pair and ventrals about equal in length. 
Suckers numerous, subglobular, not very small; near the base 
of the arms they are biserial, there being usually four to six 
thus arranged in each row; then along the rest of the length 
of the arms they become more soon and form about four 
rows, those in the two middle rows alternating with those in 
the marginal rows; toward the tip they become very small and 
crowded, especially on the dorsal and ventral arms. e num- 
ber of suckers varies with age, but on one of the larger speci- 
mens they were as follows: on each dorsal arm, sixty; on one 
of second pair, fifty-five; of third pair, fifty-three; of ventral, 
sixty-five. In this specimen the third arm of the right side and 
ventral arm of left side were abruptly terminated (perhaps acci- 
dentally), while the others were tapered to acute points. Ten- 
tacular arms, in preserved specimens, will extend back to 
posterior end of body, the naked portion smooth, somewhat 
triquetral, with the outer side convex and the angles rounded ; 
termina] portion rather abruptly widening, long ovate-lanceolate, 
curved and gradually tapering to the tip, the sucker-bearing 
portion bordered by a wide membrane on the upper and a nar- 
row one on the lower margin; the suckers are very small, sub- 
globular, crowded in about eight to ten rows in the widest 
portion. 
Color, pinkish, thickly spotted with purplish brown above, 
paler and more sparsely spotted beneath and on outside of long 
25; of head, 15; breadth of body, 17; of head, 17; length of 
fins, 15: of insertion, 11; breadth of fin, 8; front of fin to edge 
of mantle, 5; length of free portion of dorsal arms, 12°5; of sec- 
ond pair, 15; of third pair, 18; of ventrals, 18; of tentacular 
arms, 40 ; breadth of dorsal arms, at base, 8°5; of second pair, 
35; of third pair, 4; of ventrals, 85; of tentacular arms, at 
ase, 2; at expanded portion, 85; length of latter, 10°; diam- 
eter of largest suckers of sessile arms, 0°9 ; length of free portion 
of siphon, 7am 
Massachusetts Bay, in fifty fathoms, mud; off Cape Sable, 
N.S, eighty-eight to ninety-two fathoms, on hard sandy bot- 
tom ; off Halifax, fifty-seven to one hundred fathoms, on com- 
pact sandy mud, in September, with eggs. Frequently asso- 
ciated switts Octopus Bairdii V., and the following species. 
Rossia sublevis Verrill, sp. nov. 
Larger and relatively stouter than the preceding species, with 
the fins larger and placed farther forward, the front edge of the 
