1912.] NATURAL SCIENCES OF PHILADELPHIA. 403 



differentiated flattened area, where the integument is finely and 

 irregularly plicate. Club large, comprising nearly half the length 

 of the tentacle, and provided with a "broad trabeculate marginal 

 membrane similar to that of the sessile arms. Suckers in four rows, 

 large near the middle, diminishing in size toward either end, distally 

 becoming very minute, and showing the spoon-shaped arrangement 

 at the tip described by Goodrich (1896, p. 6) and Hoyle (1904, p. 31) 

 for related species; horny rings with 18-20 stout, acute, incurved 

 teeth. 



Buccal membrane seven-pointed, Bearing from three to five 

 minute suckers on each lappet. The suckers are pedunculate and 

 have horny rings. 



Gladius lanceolate; the lateral thickenings diverging from the 

 thick midrib extend along the middle of the wings for the posterior 

 two-thirds of their length (PL VI, fig. 5). 



Color of preserved specimens brownish-buff, heavily reticulated 

 above with purplish-black, lighter below, and with the ventral sur- 

 faces of the fins unmarked. 



Measurements . 



The more important measurements of two male specimens are 

 given below : 



No. 36. Xo. 341. 

 nun. mm. 



Length, total , 360 400+ 



Length of mantle, dorsal 207 235 



Width of mantle : 70 75 



Width across fins at widest point 165 156 



Width of fin at widest point, ventral 50 48 



Width of head , , 53 61 



Length of dorsal arm 61 68 



Length of second arm 76 84 



Length of third arm 95 102 



Length of ventral arm 90 95 



Length of hectocotylized portion 26 24 



Length of tentacle 127 158 



Length of tentacle club 63 79 



Diameter of largest sucker on third arm 4 4 



Diameter of largest sucker on tentacle 5 6 



Distribution. Tsuruga, Echizen (!); Tokio (Ortmann); Misaki, 

 Sagami (!); Aburatsubo, Sagami .(Wiilker); Wakanoura, Kii (!); 

 Bay of Waka, Kii (!); Kagoshima, Satsuma (Ortmann); Nagasaki, 

 Hizen (Appellof, !); Fusan, Korea (!). Trincomalee (d'Orbigny); 



