588 



male, the peduncles of the suckers of the inner row persist to the tip of 

 the arm together Avith the bars which are larger than the peduncles. It 

 will be remarked that in this specimen there are 42 pairs of suckers, or 

 the peduncles of the suckers, from the base to the tip of the arm, the 

 proximal 13 of which are provided with suckers on both rows. The 



>J 





'a % 



Distal portions of the hectocotylized arms of 0mm. sloanci pacificiis. 



Fig. 1. From a specimen from Misaki with the mantle length of 250 mm. 



Fig. 2. A siaecimen from Niigata, mantle lengtli 250 mm. 



Fig. 3. A specimen from Misaki, mantle length 240 mm. 



Fig. 4. A specimen from Iwami, mantle length 160 mm. The lines on the side of the 



figures represent Vo of the natural length. 



following five have suckers only on the inner row. The transverse bars 

 of this specimen are developed up to the 15 th, whence distally they be- 

 come obsolete. 



In another specimen from Misaki (S 13) (Fig. 3) with the mantle 



