NOTES ON THE JAPANESE MYOPSIDA. 599 



List of specimens examined. 



Specimens 



Mantle-length 



Locality 



Date 



Where preserved 





5 1 mm 



Namerikawa, Etchû 



May 23, 1905 



Sci. Coll. 





62-41 mm 



Hakodate, Hokkaido 



Jan. zi, 1 90S 



do 



i4 



70 mm 



Takashima, Hokkaido 



Feb. 1909 



Agr. Coll. 





38-20 mm 



Namerikawa, Etchû 



April 25, 1913 



do 





76 mm 



Uodzu, Etchû 





do 



Genus Promachotenthis Hoy le 1885. 

 A genus of very doubtful systematic position. 



9. Promachoteuthis megaptera Hoyle 1885. 



PromachotcutJds megaptera, Hoyle 1885, p. 273, fig. 109 (North- 

 east of Nosima). — Hoyle 1885a, p. 182. — Hoyle 1885b, p. 

 284. — Hoyle 1886, p. 120, pi. xiv, figs. 10-14, textfig. 3. — 

 Joubin 1902, p. 109, fig. 17. — Berry 1912a, p. 417. 



No new observation on the species has been made since it was 

 first described by Hoyle from a specimen obtained by the Challenger. 



Farn. IDIOSEPIID^E Appellöf 1898. 



Genus Idiosepius Steenstrup 188 1. 



10. Idiosepius pygmaeUS Steenstrup 1881. 

 Japanese : Hina-ika (n.n.). 

 Idiosepius pygmceus, Steenstrup 1881, p. 219, pi. i, figs. 11-22 

 (Near Singapore and Philippine Islands). — Appellöf 1898, pp. 



