246 A. E. Verrill— Mollusca of the New England Coast. 
the body, or even broader, with very large prominent eyes; lower 
lid prominent, a little everted, not much thickened ; pupils large, 
surrounded with a black circle in the preserved specimen. Siphon 
large, stout at base, rapidly tapering to a small tip. The basal web 
between the arms is short, extending farthest between the 3d and 
4th pairs of arms. The arms are rather large, stout, well-rounded 
externally; those of the 3d and 4th pairs are larger than the others ; 
the Ist and 2d pairs nearly equal; all the arms bear two crowded 
rows of suckers, which are similar in size and arrangement on all the 
arms, and decrease regularly to the tips. These suckers are mode- 
rately large, oblong, very oblique, with a very small orifice; the 
suckers are thickly specked with small chromatophores, except on 
the under surface. Alternating with the suckers, on each side there 
are rather large, fleshy, triangular, oblique, marginal lobes, the acute 
inner ends running in between the suckers. The tentacular arms are 
large, rather long and stout, but more slender than the other arms, 
triquetral, with rounded corners, and nearly destitute of chromato- 
phores ; the terminal club is scarcely as wide as the rest of the arm, 
rather long, narrow-lanceolate in form, tapering to a blunt tip; 
along the upper margin of the arm, opposite the commencement of 
the suckers, but well separated from them, there is a sharp, elevated 
crest or keel, which does not extend to the tip of the arm; the 
suckers are very small, much smaller than those of the sessile arms, 
cup-shaped, nearly equal, very numerous, forming eight or more indis- 
tinct, crowded rows. . 3 
The color is nearly the same over all parts of the body, head and 
outer surfaces of the sessile arms, except on the lower surface of the 
head around the base of the siphon, where it is paler. This color in 
alcoholic specimens is dark brownish purple, due to large numbers of 
rather large irregular chromatophores scattered on a yellowish 
white ground-color. The surface in many parts, especially around 
the eyes and on the dorsal surface of the body, has a glaucous blue 
tint; the under surface of the head, around the siphon, the tip of 
the siphon, and the inner surfaces of the arms and suckers are 
yellowish white, with smal! scattered chromatophores, which become 
more numerous on the exposed surfaces of the suckers; outer sur- 
faces of the arms like the body. The tentacular arms throughout 
are yellowish white, with the exception of a few scattered chromato- 
phores on the outer surface. 
