392 
A. E. VerriU- — North American Cephalopods. 
a large group of similar small suckers covers nearly the whole distal 
portion of the club (PI. LY, fig. 1) ; at the tip of the club there is 
a circle of small smooth suckers ; along the lower margin of the 
middle portion of the club there is a band of small suckers, like those 
on the other margin ; along the basal third of the margin and sup- 
ported on a thickened marginal expansion of the club, there is a row 
of six special, smooth, connective suckers, at the inner ends of trans- 
verse, muscular ridges (fig. 1, e) ; between and alternating with these 
suckers, there are deep pits and as many small, round tubercles, 
destined to fit the suckers and ridges of the other club ; continuous 
with these a row of similar, but smaller, sessile, connective suckers 
and tubercles extends down along the margin of the inner face of 
the arm, for about half its length, becoming smaller and more sim- 
ple proximally ; an irregular band, formed of two or three rows 
of small, pediceled and denticulated suckers, extends down the 
other margin of the arm, with some scattered ones along the middle. 
The pen (PI. LY, fig. It?) is thin, long and narrow ; anterior part about 
half as wide as the middle portion, slender, concave, with thickened 
margins; the anterior end is very thin, acute; the two marginal ribs 
converge gradually, as they run backward, and unite near the pos- 
terior end ; the widest part of the pen is a little behind the middle ; 
the thin margins begin at about the anterior third, gradually in- 
creasing in width to the widest part, when they still more gradually 
decrease posteriorly; but toward the end they expand into the 
obliquely hooded portion, or terminal hollow cone; this portion is 
strengthened by a dorsal mid-rib, and by numerous small ribs which 
radiate forward from the tip, one on each side being stronger than the 
rest. In life, the cone contained part of the testicle, and at the tip a 
cartilaginous core. Length of pen, in alcohol, 133 mm ; greatest breadth, 
7 rom ; of shaft, 2 - 5 mUi ; length of cone, on shortest side, 7 mm . 
General color of body, fins, head and arms, deep reddish brown, 
tinged with purple ; back darkest ; the color is due to large chro- 
matophores rather uniformly and closely scattered over the whole 
surface; on the arms and siphon they are smaller, but they cover all 
the surfaces of the arms, except the lower side of the tentacular arms 
and the face of the club. Total length, 263 mm (10'2o inches) ; length 
of mantle, 153 mm (6 inches) ; length of dorsal arms, 57 mm ; of 2d pair, 
7l mm ; of 3d pair, 77 mm ; of 4th pair, 70 mm ; of tentacular arms, 100 mm ; 
length of tail, from insertion, 63 mm ; from anterior lobe, 70 mm ; greatest 
breadth, 68 mm ; breadth of head, 29 mm . 
