3Ó2 



M. SASAKI 



cotylized right third, arc more or less damaged at the tip, it may safely be 

 said that all are subequal or nearly equal. The arm length, as measured on 

 the completely preserved left second arm, is 8s mm., which is about twice 

 the length of the head and body taken together. The suckers on the same 

 arm number thirty-two in all. Their disposition and relative size will best 



be seen from the an- 

 nexed figure. In 

 these respects there 

 exists some slight 

 deviation from the 

 Misaki specimen. 



The hectocotylized 

 right third arm presents 

 strikingly peculiar fea- 

 tures. It is a little 

 shorter than the left 

 second arm, measuring 

 75 mm. long. Its tip, 

 for a length of 14 mm., 

 is remarkably slender, 

 gradually tapering, fine- 

 ly pointed at the ex- 

 treme end and of a somewhat firm consistency. The flattened inner surface 

 of the tip shows a series of minute rounded protuberances along each of its 

 lateral margins. The tip is rather abruptly set off from the remaining parts 

 of the arm by the presence, at the junction on the inner surface, of an an- 

 gular shaped swelling, of which the angle is pointed distad and the two 

 ends project on the sides of the arm. The swelling is traversed by a well 

 defined narrow and deep groove of a similar shape and disposition, so that 

 it may be said to consist of a distal and a proximal lip-like ridge, passing 

 into each other at the sides. The proximal ridge exhibits in the middle a 

 small rounded protuberance. Directly proximal to the above swelling and 



