A. JE. Verrill — North American Cephalopods. 
265 
four regular 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 upper (?) 
margin are decidedly larger than those of the two lower (?) 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. 
Diameter of largest, _ -35 
Height of largest, -28 
Diameter of lateral, -18 
Height of lateral, -09 
Diameter of smooth-rimmed ones, DO 
Diameter of tubercles, -08 
Of largest lateral ones of distal section, -14 
Of median lateral ones of distal section, -11 
Buccal membranes and jaws. 
Plate XXVI, fig. 7. 
This specimen fortunately had the buccal membranes and other 
parts about the mouth perfectly preserved, which has not been the 
case in the large 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 between 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, except from the dorsal one, which sends 
off a membrane which divides, one part going to the inner lateral 
surface of each dorsal arm. The membranes 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 con- 
spicuous, 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 
surrounding the beak, is whitish, thickened at the margin, and 
strongly irregularly wrinkled and puckered. 
The jaws have sharp, dark brown tips, changing to clear brown 
backward, with the laminae very thin, transparent, and whitish. The 
