ON A NEW SPECIES OF OEGOPSIDS 



FROM THE BAY OF TOYAMA, 



GONATUS SEPTEMDENTATUS. 



Ey 

 Madoka Sasaki, Rigakushi. 



n. m± fe ^ Tic m. 



This cuttle-fish is often caught with drag-net at loo fathoms or more along the 

 coast of Etchii Province, where it is commonly called "Dosn-ika" by the fishermen. 

 All the specimens (in formalin) which came under my obser\-ation were females, 

 and their measurements were as follows : 



Dorsal length of mantle 

 Ventral length of mantle 

 Circumference of mantle 

 Breadth of mantle 

 Length of head 

 Breadth of head 

 Length of fins 



left right left right left right left right left right left riglit 



Length of first arm jo 70 82 81 79 /6 88 88 — — 103 103 



,, ,, second arm 78 — 94 93 93 90 98 98 — — • 108 108 



,, ,, third arm 70 — 90 89 — 92 95 97 — — 108 107 



,, ,, fourth arm 65 — 82 82 78 78 87 84 — — 102 102 



Length of tentacle 190 — 120 125 115 115 160160 — — 200200 



„ ,, club 80 — 70 70 65 65 80 80 — — 100 100 



Length of nidamental gland 25 35 35 35 50 



The measurements of the gladius of a specimen with the mantle-length of 



