392 PROCEEDINGS OF THE ACADEMY OF [July, 



Color a dark blackish slate, paler below and within the arms. 



Measurements. 



mm. mm. mm. 



Total length 106 85 78 



Length of mantle (dorsal) 18 15 15 



Width of mantle 20 15 14 



Width of neck 14 11.5 10.5 



Width of head 15 14 13 



Length of funnel v 10 9 6 



Length of right dorsal arm * 70 56 50 



Length of left dorsal arm 71 55 49 



Length of right second arm 75+ 64 54 " 



Length of left second arm 83 65 54 



Length of right third arm 78 65 60 



Length of left third arm 84 65 60 



Length of right ventral arm 75 58+ 58 



Length of left ventral arm 75 58 61 



Length of hectocotylus 3 



Length of umbrella between dorsal 



arms 14 14 8 



Length of umbrella between ven- 

 tral arms .. 11 12 8 



These specimens in certain ways suggest the P. globosus of Appellof, 

 but the order of the arms is decidedly different, and the hectocotylus, 

 though very much smaller, is of a similar type to that prevailing 

 in the hongkongensis group. The possibility has not been over- 

 looked that they may be young P. dofleini, but here again the arm 

 formulae fail to coincide. 



Polypus januarii (Steenstrup, 1885). 



Octopus januarii "Steenstrup, MS.," Hoyle, 1885a, p. 229. 

 Octopus januarii "Steenstrup, MS.," Hoyle, 1885c, p. 105. 

 Octopus januarii Hoyle, 1886, pp. 11, 76, 97, etc., pi. 7, fig. 4. 

 Octopus Januarii Goodrich, 1896, p. 19. 

 Polypus januarii Hoyle, 1904, p. 18, pi. 5, fig. 2 (radula). 



A very distinct species, well differentiated from all other Japanese 

 Polypi by its soft, smooth integument, pinkish color, swollen eyes, 

 extensive umbrella, short conical hectocotylus, and abyssal habit. 

 It has been taken in this region only by the " Challenger," which 

 secured a single cf 1 specimen at a depth of 1875 'fathoms in the 

 North Pacific east of Japan (Hoyle, 1886). 



Distribution. North Pacific, east of Japan (Hoyle). Off Barra 

 Grande, Brazil (type locality, Hoyle) ; Rio de Janeiro, Brazil (Hoyle) ; 

 Bay of Bengal (Goodrich); Andaman Sea (Goodrich); off the 

 Cocos Islands (Hoyle). 



