392 A. E. Verrill — North American Cephalopods. 



a large group of similar small suckers covers nearly the whole distal 

 portion of the clul) (PI. LV, tig. 1) ; at the tip of the club tliere is 

 a circle of small smooth suckers ; along the lower margin of the 

 middle portion of tlie 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- 

 j)le proximally; an irregular band, formed of two or three rows 

 of small, pediceled and denticulated suckers, extends down the 

 other margin of the arm, witli some scattered ones along the middle. 



The pen (PI. LV, fig. If?) 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 ; tlie 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""" ; greatest breadth, 

 Hram . of shaft, 2*5'""'; length of cone, on shortest side, 7'"'". 



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'"'" (10-25 inches) ; length 

 of mantle, 153"'"' (6 inches); length of dorsal arms, 5*7"""; of 2d pair, 

 Yl'""' ; of 3d pair, 11"'"' ; of 4th pair, 70""" ; of tentacular arms, 100""" ; 

 length of tail, from insertion, 63'"'" ; from anterior lobe, 70""" ; greatest 

 breadth, 68""" ; breadth of head, 29'"'". 



