Notes on Oegopsid Cephalopods found in Japan. 



By 



Madoka Sasaki, Rigakushi. 



College of Agriculture, Sapporo. 

 With Plate III. 



In the present paper all the species of Oegopsid Cephalopods known 

 from Japan are listed and noted on. My study of the group was done 

 mainly on specimens preserved in the Science College, Tokyo ; in the 

 Sapporo Agricultural College ; in the Takashima Fishery Experimental 

 Institute, Hokkaido ; and in the Namerikawa Fishery Institute, Etchu 

 Prov. The species number twenty-nine in all, representing twenty-two 

 genera. One of the latter seems to be new to science and presents 

 some interesting features. 



Division OegOpsida d'Orbigny 1839. 



Farn. Architeuthidae Pfeffer 1900. 

 Genus Architeulhis Steenstrup 1857. 

 I. Architetithis japonica Pfeffer 191 2. 



Mitsukuri & Ikeda 1895, p. 3g, pl. x (without name). Tateyama Pay, Awa Prov. 

 Arcliiteathiis marlemii, Berry 1912a, p. 433. 

 Arcìiiteiitìds jafonica, Pfeffer 1912, p. 27. 



Of this species no other specimen than that which was described by 

 Mitsukuri and Ikeda and is preserved in the Sci. Coll., has come under 

 my observation. 



