[87] CEPHALOPODS OF NORTHEASTERN COAST OF AMERICA. 297 



four or live long incurved teeth, while the iuuer edge is smooth. Of the 

 small oues, 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 dimmish 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 being 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 arc 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, fiat, 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 «), not counting the numerous very 

 small ones, within one-third of an inch of the tip. These secondary 



