224 
A. E. Verrill — North American Cephalopoda. 
lid-like margins. The eyes are large, prominent, oblong, and naked ; 
the anterior portion is swollen laterally on both sides. The short 
arms are trapezoidal, the dorsal ones somewhat shorter (about T25 
inch) and smaller than the others, which are nearly equal in length, 
the second pair being stouter than the rest, and a little longer. The 
dorsal arms have a slightly prominent membrane along the outer 
angles ; the subdorsal or upper lateral arms are narrowed to an acute 
edge or crest on the outer angle, but on the inner angle have a broad, 
thin, marginal membrane, outside the suckers. The lower lateral 
arms are similar in size and form, and also have a very broad, lateral, 
marginal membrane, next to the suckers, on the lower side. The 
ventral arms are more slender and a tritie longer, and have narrower 
marginal membranes. The tentacular-arms are slender, elongated, 
expanded toward the tip, and have suckers arranged much as in the 
gigantic species, even to the smooth-edged suckers and opposing 
tubercles, proximal to the large suckers, as I have described them in 
A. Harveyi. The sucker-bearing portion is margined by a membrane 
on each side. 
The small proximal suckers of the tentacular-arms occupy about 
44.5mm ( 1-75 inches) at the commencement of the terminal club; they 
are about 1 , 5 mm in diameter, circular, regularly cup-shaped, with a 
nearly even, smooth rim ; they are raised on slender pedicels. Alter- 
nating with these are smooth rounded tubercles, which are also on 
pedicels and slightly larger than the intervening suckers. There are 
four suckers and four tubercles in the row along the inner margin ; 
along the outer margin there are fewer, smaller suckers, but without 
horny rings; if they originally had such rings they were probably 
smaller than the others. The large suckers (Plate XXI, fig. 9), 
forming the two central rows on the terminal club, are furnished 
with a somewhat oblique, dark brown ring, very strongly and sharply 
toothed around the outer portion of the edge, and usually with one 
tooth larger and longer than the rest, on the middle of the outer 
margin ; inner margin with much smaller, very acute teeth, of unequal 
size. The teeth are gold-colored at tip. 
Larger suckers of the sessile arms are very oblique, with the rim 
strong, dark brown, bearing large, strong, sharp, much incurved, une- 
equal teeth on the outer side of the rim ; the inner margin is entire. 
The ventral arms bear about 44 similar suckers, exclusive of the 
minute ones close to the end ; the largest ones are situated beyond 
the middle of the arm. The lateral arms bear about the same num- 
ber of large suckers, with numerous minute ones at the tip. The 
