No. 2310. NEW CEPHALOPODS FROM THE PACIFIC—SASAKI. 199 



and then tapering off caudad. Fins terminal, both together of 

 kidney-shape, deeply indented at the anterior attachment; their 

 total breadth far greater than their length which is in turn about 

 three and a haK times the length of body. 



Head a little narrower than body. Eye-opening wide, with a 

 deep sinus a little below the middle of the anterior margin, Funnel 

 groove ill-defined. Nuchal cartilage elongated, very slightly widen- 

 ing cephalad. Funnel short, deeply contracted. Funnel organ com- 

 posed of one A -shaped dorsal pad and two oval ventral pads. Fun- 

 nel cartilage nearly lanceolate, with the sharper end anteriorly; 

 locldng groove narrow throughout, extending the whole length of 

 the cartilage. 



Arms subequal, the formula of length being 2>3>1 = 4, the 

 longest being five-sixths the length of body. All comparatively 

 rapidly tapered in the proximal two-thirds, the remaining one-third 

 somewhat characteristically attenuated but terminating in a compar- 

 atively blunt extremity. Armatures in the proximal two-thirds, 

 quadriserial, consisting of two outer rows of minute suckers and two 

 inner rows of relatively large hooks ; in the distal one-third, they are 

 composed of minute suckers arranged in 8-12 series. This is, how- 

 ever, exceptional for the ventral arms, where the armatures are all 

 coniposed of suckers only. 



Tentacles absent. Buccal membrane relatively broad, with 

 seven marginal projections. 



Total length 130 mm. ; dorsal length of body 65 m.m. ; maximum 

 breadth of body 22 mm. ; length of fu'st right arm 45 mm. ; of second 

 arm 55 mm. ; of third arm 52 mm. ; of fourth arm 53 mm. 



r^ype.— Cat. No. 332918, U.S.N.M. 



Family OMMASTREPHIDAE Gill. 

 Subfamily Ommastrephinae Carus. 



Genus OMMASTREPHES d'Orbigny. 



55. OMMASTREPHES SLOANI PACIFICUS (Steenstrup). 



Todarodcs padficus Steenstrup, Overs. Danske Vid. Selsk. Fotr., 1880, pp. 83, 



90, etc., 1 fig.— HoYLE, Challenger Cephalopoda, 1886, pp. 34, 163, pi. 28, figa. 



1-5.— JouBiN, Bull. Soc. Zool. France. 22, 1897, p. 103. 

 Ommastrephes padficus Appellof, Japanska Cephalopoder, 1886, p. 35, pi. 3. 



figs. 8-10. 

 Ommastrephes sloani Berry, Japanese Cephalopoda, 1912, p. 433, pi. 6, fig. 4. 

 Ommatostrephes sloani padficus Pfeffer, Plankton-Exp. Cephalopoda, 1912, p, 



456, pi. 34, figs. 3-6. 



Hakodate market. One juv. Cat. No. 332932, U.S.N.M. 

 Sado Island. One juv. Cat. No. 332933, U.S.N.M. 

 Station Ebisu market, Sado Island. Three females and one male. 

 Cat. No. 332930, U.S.N.M. 



