No. 2310. NEW CEPHALOPODS FROM THE PACIFIC— SASAKI. 181 



Station 4872 (east of Tsushima). One juv. specimen. Cat. No. 

 3329G0, U.S.N.M. 



Station 5005 (Sakhalin). One immature male. Cat. No. 332962,, 

 U.S.N.M. 



Nagasaki. One imm„ature male. Cat. No. 332958, U.S.N.M. 



Shim.onoseki. One immature female. Cat. No, 332957, U.S.N.M. 



Station 4942 (off Osumi). One immature female. Cat. No. 

 332961, U.S.N.M. 



Shimizu, Suruga. One m.ale. Cat. No. 332959, U.S.N.M. 



These specimens are referred with a great deal of hesitation to 

 Polypus mccropus, although they agree in most particulars with 

 the descriptions of the authors consulted. On the whole I have 

 much doubt Vvhetlier the species extends as far as the Japanese 

 waters from its home; that is, the Mediterranean Sea. As far as I 

 have examined, indeed, there exist many specific discrepancies be- 

 tween that species and the Japanese form which have been con- 

 sidered identical by authors. The principal differences consist in 

 the structure of the funnel organ, hectocotylus, and spermatophores . 

 Of these points I shall have to speak more in detail in another pub- 

 lication. 



22. POLYPUS MACROPUS. var. MINOR, new variety. 



Station 5074 (Suruga Bay). Two mature males. Cat. No, 

 332963, U.S.N.M. 



Surface faintly warty, rather soft to the touch. Body elongated, 

 nearly fusiform, somewhat pointed behind ; no horizontal ridge pres- 

 ent on sides nor longitudinal groove on belly. Mantle opening 

 broad, extending more than half around the body. 



Head about as broad as body, concave above, marked off by a 

 strong constriction both in front and behind. Funnel small, its 

 freely projecting part slender. Funnel organ small, consisting of 

 two far separated V-shaped pads, of which the inner limb is -^-| as 

 long as the outer. 



Arms greatly unequal, the formula of length being 1 > 2 > 3 > 4 ; 

 longest pair about seven times as long as body. All quadrangular 

 in section in the proximal parts and roundish in the distal, lacking 

 contractile web on either side. Umbrella ill developed, its radius 

 varying with the length of the arm along which it extends. Suckers 

 prominent, rather sparsely set in two alternating rows. 



Right third arm markedly affected by hectocotylization, being 

 much shorter than the left third ; on the normal part there are found 

 only 21 or 24 pairs of suckei-s. Terminal organ conspicuous, about 

 one-seventh the entire length of the arm, nicely spoon-shaped, with 

 ample copulatory groove. 



Gill composed of only 15-17 leaflets. 



