NOTES ON THE JAPANESE MYOPSIDA. 



593 



Male Female 

 mm. mm. 



Length of head (between nuchal ligament and um- 



brella margin between dorsal arms 11.5 16 



Breadth of head 17 23 



Breadth of nuchal ligament 11 14 



Length of fin 17 23 



Breadth of fin 11.5 18 



Length of fin at plane of attachment 10 15 



Distance from mantle margin to anterior end of 



fin attachment 8 10.5 



Length of first arm (right) 15.5 27 



,, „ second arm (do) 30 33 



„ „ third arm (do) 26 30 



,, fourth arm (do) 21.5 26.5 



Length of tentacle (do) 34 35 



„ „ club (do) 8 10 



List of cotypes. 



Specimens 



Mantle-length 



Locality 



Date 



Where preserved 





19 mm 



Takashima, Hokkaido 



May 12, 1909 



Agr. Coll. 





19 mm in ea.h 



Off Wakimoto, < )shima 

 Pro v., Hokkaido 



Oct. 27, 1912 



Fish. Exp. Inst. 

 Takashima 





19 mm 



Misaki 





Agr. Coll. 



»4 



32 mm 



Oshoro, Hokkaido 



May 12, 1909 



do 



»-£ 



22.5 mm 



Takashima 



Oct. 3, 19 10 



do 



14 



20 mm 



Off Kikonai. Oshima 

 Prov., Hok. 



Oct. 19, 1912 



do 



Remarks. The present species has a very close affinity to the 

 precediug E. morséi, but differs from it very markedly in the shape 

 of tentacular suckers and in the size of arm-suckers in the male. 



