NOTES ON THE JAPANESE MYOPSIDA. 



609 



delta; Port Blair; Andaman Sea). — Joubin 1898, p. 25 (St. 

 Vincent; Nassau harbor; Bahama). — Wulker 1910, p. 11 

 (Misaki). — Berry 1912a, p. 418 (Tsuruga, Echizen). 

 Japanese specimens of this species have not come under observa- 

 tion of the author. 



26. Sepia subaculeata sp. nov. 



PL XII., figs. 6, 7. 



Diagnosis. Body large ; mantle short, oval, broadest near the 

 middle, bluntly pointed behind. Head small. Arm subequal in 

 length, the order of their length being 4, 1, 2, 3 ; the longest arm 

 shorter than half the length of mantle. Arm-suckers arranged dis- 

 tinctly in four series in the whole extent of every arm ; horny ring 

 generally entire, except in suckers in terminal parts of arms, where 

 it shows numerous bluntly pointed teeth. Buccal membrane provided 

 with from two to five small suckers on every projection of margin. 

 Tentacles longer than head and mantle combined, provided with 

 suckers in distal one-fifth of their length. Tentacular suckers nearly 

 equal in size, arranged in eight series ; horny ring finely toothed. 



Shell broad, elongate-elliptical in outline, rounded at both extre- 

 mities ; dorsal surface moderately convex ; ventral surface arched in 

 the middle, provided with a deep median groove which is deepest in 

 the anterior part of the striated area ; anterior boundary line of the 

 striated area shows two straight lines meeting each other at an acute 

 angle. Inner cone well developed, with very thick rim. Rostrum 

 very small. Locular index 34 in male. 



Four specimens purchased at the fish market in Tokyo, Nov. 1882 

 (Sci. Coll.). Dimensions of typical male and female adult specimens 

 (in alcohol) as follows : 



