174 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 57. 



g5_90 pairs on each arm, closely set in two well-defined rows ex- 

 cepting several at base which are sparsely arranged in one zigzag, or 

 two alternating rows. They are very unequal in size and increase 

 rapidly to the fourteenth or fifteenth pair on each arm, beginning 

 with a minute sucker at base. The fifteenth to the seventeenth pair 

 which are opposite to the umbrella edge, are markedly enlarged, and 

 succeeded by several pairs of quickly diminishing suckers; beyond 

 these they become smaller very gradually and uniformly toward the 

 extremity. 



Right third arm hectocotylized, about four-fifths as long as the left 

 third; terminal organ slender conic, occupymg one-thirteenth of the 

 entire length and provided with a distinct copulatory groove. Suckers 

 on the normal part 57 pairs. 



Gill composed of 21-23 branchial leaflets. 



Penis fusiform, 25 mm. long, connected with the duct of Needham's 

 sac at a point one-third the length from the distal end. Sperma- 

 tophores about 90 mm. long. 



Vaginae thick, short terminating for behimd the anus. 



Total length 52 cm. in male, 39 cm. female. 



Type.— Cat. No. 332935a., U.S.N.M. 



12. POLYPUS OCHOTENSIS, new species. 



Station 5023 (near Cape Patience, Okhotsk Sea). One female. 

 Cat. No. 332955, U.S.N.M. 



Station 5026 (Taraika Bay). One young male. Cat. No. 332956, 

 U.S.N.M. 



Superficial texture loose, soft and flabby. Surface quite smooth, 

 or with a few warts. Three unequal cirri are present above each 

 eye. Body globose, as long as wide, provided with a distinct hor- 

 izontal ridge around periphery, but vvith no median groove on belly. 

 Mantle opening of moderate width. 



Head large. Neck constriction not marked. Umbrella well- 

 developed, extending M-M up the arms and thereafter continued as 

 a narrow contractile membrane along the ventral side to the extrem- 

 ity. Funnel incorporated with head excepting a short conical ex- 

 tremity. Funnel organ W-shaped, the A -shaped middle part shghtly 

 longer than twice the length of outer limbs. 



Arms nearly uniform in length and a little longer than three times 

 the mantle length. Suckers rather small, arranged in two well- 

 defined rows excepting the first three or four which are in a zigzag 

 row. None of suckers specially enlarged. Right third arm hecto- 

 cotylized, its terminal organ ^ the entire length; suckers on the 

 normal part 42 pairs. 



Gill composed of 18 or 19 leaflets. Ink gland present. Ovary 

 markedly expanded sideways, its eggs about 9 mm. long, numbering 

 33. Oviducts proper situated to the right of their usual position. 



