54 U.S. NATIONAL MUSEUM BULLETIN 2 34 



In the females the suckers are in two rows ba sally for about three 

 pairs after which they become four-rowed, remaining so to the distal 

 tip. The suckers of both the inner rows are of equal size, no dis- 

 cernable or measurable differences being found. The sucker apertures 

 are smooth, untoothed. 



In the males the suckers are irregularly biseriaUy arranged at the 

 base for about three pairs after which they are found in four rows. 

 On the right dorsal arm the suckers of the outer rows are about equal, 

 both ventral and dorsal, and about a third to a half larger than the 

 suckers of the two median rows. On II the suckers of the outer 

 rows are still not strikingly larger, but the suckers of the ventral row 

 are slightly larger than those of the dorsal row and about a half 

 larger than the median ones. On III the suckers of the median row 

 are slightly smaller than those of the outer rows, but about three or 

 four of the median suckers of the ventral row are much larger than 

 the remaining ones of that row or the dorsal. These three or four 

 enlarged suckers are about three or four times larger than those of 

 the median row. About half the males available to me have three 

 enlarged suckers on III, the others four. On IV the suckers of the 

 median rows are smaller than those of I, II, and III and again the 

 outer rows are simUar to those of the other arms except that three 

 or four of the median suckers of the dorsal row are greatly enlarged 

 and four or five of those of the ventral row are abruptly enlarged. 

 This order seems to be consistent in all the males studied. 



The left dorsal arm of the male is hectocotylized. Basally there 

 are 20 to 25 suckers in four rows of nearly equal size. Near the 

 middle of this area in the ventral row are one, rarely three, prominent, 

 usually suckerless nipplelike papillae. Distal to the normal suckers 

 are 35 to 40 closely palisaded papillae terminating in a slitlike aperture 

 containing a small sucker. The palisade effect is only visible on the 

 ventral side of the arm. The arm is stouter than its right counter- 

 part and may be slightly shorter but this shortness is probably due 

 to the strongly outward cm'ling of the arm. 



The tentacles are short, round, flattened on the oral surface, with 

 the edges of the flat area angled, the dorsal edge forming a low web 

 which at the base of the club becomes broader, extending to the tip 

 of the club. The club is short, curled, and rounded with numerous 

 rows of very minute suckers. 



The color in alcohol is yellowish with numerous large purplish- 

 brown chromatophores distributed over the dorsum of the mantle, 

 head, and arms. Ventrally the pigment spots are just as numerous. 

 The fins are completely devoid of pigment except for a small portion 

 on the base. The arms are banded, with large rectangular or oval 



