A. JS. Verrill — JVorth American Cephalopods. 235 



alternating I'ow of much smaller marginal ones. On the lower 

 edge of the jjroximal portion of the club, extending from the middle 

 backward, there is a row of four small, smooth-edged, unequal suckers, 

 alternating with rounded, sessile tubercles that fit into corresponding 

 suckers on the other arm ; a row of similar but smaller suckers extends 

 for about six inches along the inner surface in the median line of the 

 arm, alternating at first singly, and then two by two, with tubercles, 

 and gradually becoming more distant. The end of the arm, beyond 

 the expanded club, bears minute serrate suckers, at first in six rows, 

 decreasing to two toward the end. The extreme tip bears a small 

 group of minute, smooth-edged suckers. The largest suckers of the 

 club are decidedly constricted below the margin, and then swell out 

 at the basal portion. The edge of the horny rim is divided into very 

 numerous, small, incurved and crowded denticles, nearly equal in 

 length, but part are thickened and obtuse, while the rest ai"e more 

 slender and acute. Diameter of the largest suckers, 6*5""^ ; of the 

 largest in the second row, 5 "5 ; of the largest in the lateral rows, 3 

 to 4 ; of the largest smooth-rimmed marginal suckers, 2 to 2*5 ; of 

 the smooth-rimmed suckers of the wrist, 1*5 to 2. 



Sessile arms stout, trapezoidal, tapering to slender tips, and bear- 

 ing two rows of numerous suckers. All the arms on the left side are 

 an inch or more longer than the corresponding right ones. The dor- 

 sal and ventral arms, of the same side, are about equal, and decidedly 

 shorter than the two lateral pairs, which dififer but little in length. 

 Web about two-thirds as broad as the length of the arms, uniting the 

 upper three pairs together, and as a narrowing border extending 

 along their sides, to the tips. The lower lateral arms have a thin, 

 crest-like membrane on their outer, median surface, commencing at 

 the basal fourth and extending nearly to the tips. The ventral arms 

 are united together, toward the base, by a web, which is also joined 

 to the main web, in the median plane. A narrow outer web, arising 

 from the outer angles of the arms, also unites all the arms together 

 for a short distance above their bases. 



The suckers are all similar in form. The larger ones on the dorsal 

 arms are, perhaps, a little larger than those on the lateral and ventral 

 ones. The largest are subglobular, laterally attached, and gibbous; 

 the aperture is small, usually wath three or four flat, blunt, or rounded 

 lobes or denticles on the outer mai'gin, with none on the inner margin. 

 The pedicels of the larger suckers are very stout at base, tapering up 

 to their attachment on the lower side of the sucker, where they are 

 small and slender. The largest suckers of the dorsal arms are 5™°^ 



