[ 87 ] CEPHALOPODS OF NORTHEASTERN COAST OF AMERICA. 
four or five long incurved teetli, while the inner edge is smooth. Of the 
small ones, before the commencement of the two median rows of large 
suckers, there are from ten to fifteen. 
The middle region of the club is occupied by two rows of large suckers 
(fig. 2) and by a row of small marginal ones, on each side, alternating 
with the large ones. The uppermost of the two rows of large suckers 
contains one or two more suckers than the lower, and they are also 
larger. The number in the upper row is seven to nine, in the lower five 
to seven, the largest specimens having the greater number. Of these, 
the three to five middle ones in each row are decidedly the largest, and 
have the edge of the marginal ring nearly smooth and even; at each 
end of each row the suckers diminish in size and the edge becomes 
denticulated, at first by the formation of narrow incisions, which leave 
broad, stout, blunt denticles; but as the suckers diminish in size these 
become longer, narrower, and more acute ; their inner margins remain 
smooth. The large suckers are broad and moderately deep, somewhat 
swollen below, and a little oblique. The marginal suckers are much 
smaller, shallower, more oblique, and have the entire rim finely and 
sharply denticulated, the denticles beiug longer and strongly incurved 
on the outer margin. Beyond the rows of large suckers there is, at first, 
a small group of sharply denticulated suckers, in four rows, resembling 
the marginal ones in form and size; but these rapidly decrease in size 
and become more crowded, till they appear to form eight crowded rows 
of very small suckers, with minute apertures, which occupy the entire 
face of the terminal section of the club to the tip; at the extreme tip 
there is a cluster of small smooth-rimmed suckers, as usual. 
The suckers of the sessile arms are largest on the two lateral pairs, 
on which they are nearly equal, and the largest are about the same in 
size as those on the tentacular club, the latter being often the smaller in 
the males, but usually the larger in the females; those of the ventral 
arms are smallest; those of the dorsal arms are intermediate in size be¬ 
tween those of the lateral and ventral arms. The first few suckers (three 
to-five), at the base of each arm, are smaller than those beyond, but in¬ 
crease regularly in size; they have the edge of the rim nearly entire, or 
with only a few blunt teeth on the outer margin; then follow about 
twelve suckers, of the largest size. These large suckers (Plate XIX, 
figs. 5, 5 a) are deep, oblique cup-shaped, somewhat swollen in the 
middle, with oblique horny rims, which are entire on the inner margin, 
but on the outer have a large, strongly incurved, acute median tooth, 
on each side of which there are usually four or five shorter, flat, blunt 
teeth; but toward the base of the arms these are fewer and shorter, 
while distally they become more numerous, longer, and more acute, and 
often the edge is more or less denticulate nearly all around. The larger 
suckers are followed by a regularly decreasing series of thirty to forty 
smaller secondary ones (figs. G, G a), not counting the numerous very 
small ones, within one-third of an inch of the tip. These secondary 
