A. E. 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, ._ 'lO 



Diameter of tubercles, -08 



Of largest lateral ones of distal section, •14 



Of median lateral ones of distal section, -11 



Buccal memhranes and jaws. 

 Plate XXYI, 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 

 sui'face 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 laminaj very thin, transparent, and whitish. The 



