80 U.S. NATIONAL MUSEUM BULLETIN 2 34 



suckers with chitinous toothed rings. The 24th and 25th pairs of 

 suckers are abruptly much smaller than the others with smooth 

 chitinous rings. Beyond the 25th sucker the suckers of the dorsal 

 row become minute, without a chitinous ring and placed on the tip 

 of a large fleshy triangular peduncle whose base crosses the oral surface 

 of the arm as a low ridge, but separated from a similar construction of 

 the ventral row. Beyond this are about 14 large triangular pedicels 

 decreasing in size to the tip. The ventral row of suckers is similarly 

 modified but is lower and not as conspicious. The ridge between 

 the dorsal and ventral pedicels is longitudinally grooved to give the 

 appearance of a weblike structure. The suckers of the right ventral 

 arm are normal. 



The tentacles are of medium length and stout, the stalks laterally 

 compressed. The club is only slightly expanded, bordered on either 

 side by a strong and well-developed protective membrane -with prom- 

 inent supports. The aboral sm'face of the club bears a strong keel 

 for almost the full length. The tentacular suckers are in four rows. 

 There is an indistinct carpal cluster followed by 10 pairs of large 

 suckers whose horny rings bear 14 to 16 small sharp, widely spaced 

 triangular teeth. The suckers of the dorsal and ventral marginal 

 rows are two-thirds the size of the median suckers and are equipped 

 with eight or nine large long slender curved sharp teeth on the outer 

 margin and about the same number of tiny sharp triangular teeth 

 on the inner margin. The distal section of the club bears about 

 four rows of small toothed suckers, terminating in an expanded 

 flattened tip which bears a circlet of suckers composed of two rows of 

 flattened smooth-ringed suckers closely spaced and surrounding a 

 clear open section in the center. There are 14 suckers in the outer 

 ring and 9 in the inner ring. 



The spermatophores are well described by Sasaki (1929). 



The color is very variable, both when specimens are alive and in 

 preservation. The chromatophores are large and very numerous 

 dorsally in the mantle, fins, head, and arms, but are small or absent 

 ventrally. The mantle and fins may have numerous transverse 

 markings or there may be a series of about 10 round dark spots in a 

 single series along the fins. 



Type. — Not traced (Museum National d'Histoire Naturelle. 

 Paris(?)). 



Type Locality. — Not traced. 



