[ 39 ] CEPHALOPODS OF NORTHEASTERN COAST OF AMERICA. 
rows of small denticulated suckers, more strongly toothed on the outer 
margins, and similar in form to the marginal suckers of the middle 
region. Of these the two rows next the lower margin are decidedly 
larger than those of the two upper rows. Close to the tip there is a» 
group of about a dozen minute suckers, with smooth even rims. The 
middle portion of the club is bordered on each side by a rather broad, 
thin, scalloped membrane. The distal section has a broad keel on the 
outer margin. 
Suckers of tentacular arms (in inches ). 
Diameter of largest suckers.35 
Higlit of largest.-.28 
Diameter of lateral.18 
Hight of lateral.09 
Diameter of smooth-rimmed ones.10 
Diameter of tubercles.08 
Of largest lateral suckers of distal section.14 
Of median lateral ones of distal section.11 
Buccal membranes and jaws .—(Plate VI, fig. 1.) 
This specimen fortunately had the buccal membranes and other parts 
about the mouth perfectly preserved, which has not been the case in the 
larger specimens. The outer buccal membrane is broad and thin, rather 
deeply colored externally. Its margin extends into seven acute angles, 
one of which is opposite each of the lateral and ventral arms; but on 
the dorsal side there is only one, which corresponds to the interval be¬ 
tween the two dorsal arms. From each of these angles a membrane 
runs to, and for a short distance along the side of, the opposite arm, ex¬ 
cept from the dorsal one, which sends off a membrane which divides, one 
part going to the inner lateral surface of each dorsal arm. The mem¬ 
branes from the upper lateral and ventral angles join the upper lateral 
sides of their corresponding arms ; those from the lower lateral angles 
go to the lower lateral sides of the third pair of arms.. The inner surface 
of the buccal membrane is whitish, and deeply and irregularly reticulated 
by conspicuous soft wrinkles and furrows, which become somewhat con¬ 
centric toward the margin. Beneath this membrane are openings to the 
aquiferous cavities. The inner buccal membrane, immediately surround¬ 
ing the beak, is whitish, thickened at the margin, and strongly irreg¬ 
ularly wrinkled and puckered. 
The jaws have sharp, dark brown tips, changing to clear brown back¬ 
ward, with the lainime very thin, transparent, and whitish. The upper 
mandible has the rostrum regularly curved, with a distinct ridge, in 
continuation with its cutting edges, extending down the sides, and only 
a slight notch at its base. 
The lower mandible has a notch close to the tip, with the rest of the 
