[39] CEPHALOPODS OF NORTHEASTERN COAST OF AMERICA. 249 



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 



Higlit 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 do\sal 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 hner lateral surface of each dorsal arm. The mem- 

 branes from the upptr lateral and ventral angles join the upper lateral 

 sides of their corresponding arms ; those from the lower lateral angles 

 go to the lower lateralsides of the third pair of arms. The inner surface 

 of the buccal membrantis whitish, and deeply and irregularly reticulated 

 by conspicuous soft wrukles and furrows, which become somewhat con- 

 centric toward the margin. Beneath this membrane are openings to the 

 aquiferous cavities. Theinner buccal membrane, immediately surround- 

 ing the beak, is whitish, thickened at the margin, and strongly irreg- 

 ularly wrinkled and puckered. 



The jaws have sharp, dare brown tips, changing to clear brown back- 

 ward, with the laminoe very bin, transparent, and whitish. The upper 

 mandible has the rostrum regularly curved, with a distinct ridge, in 

 continuation with its cutting *dges, extending down the sides, and only 

 a slight notch at its base. 

 The lower mandible has a n<ich close to the tip, with the rest of the 



