1912.] NATURAL SCIENCES OF PHILADELPHIA. 417 



magnitude of its head and fins and the great width of the nuchal 

 commissure. If the type is adult, it is also a much smaller species 

 than S. nipponensis. 



Naef (1912) has recently made S. nipponensis the type of a new 



genus Sepiolina. 



Sub-family ROSSIIN^. 



Genus ROSSIA Owen, 1834. 

 Rossia SP. 



Dr. Heath has shown me egg capsules containing late embryonic 

 stages of some species of Rossia. The animals were far enough 

 advanced to exhibit clearly the distinctive characters of the genus. 

 They were taken off the northwestern coast of Honshu. 



Genus PROM AC HOTEU THIS Hoyle, 1885. 

 Promachoteuthis megaptera Hoyle, 1885. 



Promachoteuthis megaptera Hoyle, 1885, p. 273, fig. 109. 



Promachoteuthis megaptera Hoyle, 18856, p. 182. 



Promachoteuthis megaptera Hoyle, 1885d, p. 284. 



Promachoteuthis megaptera Hoyle, 1886, pp. 19, 120, etc., text fig. 3, pi. 14, 



figs. 10-14. 

 Promachoteuthis megaptera Joubin, 1902, p. 109, fig. 17. 



Distribution. 1,875 fathoms, southeast of Nosima (type locality 



-Hoyle). 



Family SEPIID^l Steenstrup, 1861. 



Genus SEPIA Linne, 1758. 



The tremendous development of the genus Sepia, both in species 

 and number of individuals, is the most conspicuous feature of the 

 cephalopod fauna of Japan, as it is likewise in the waters of the 

 Indo-Malayan Archipelago. It is therefore not surprising to find 

 that no less than eighteen names have at one time or another been 

 applied to Japanese forms. These are as follows: 



Sepia aculeata. Sepia peter seni. 



Sepia sinensis. g Sepia tullbergi [ = Metasepia]. 



Sepia chrysophtalmos. 10 Sepia tokioensis. 



Sepia myrsus. 11 Sepia hoylei. 



Sepia andreana. Sepia torosa. 



Sepia esculenta. Sepia hercules. 



Sepia elliptica. Sepia longer a. 



Sepia kobiensis. Sepia misakiensis. 



Sepia andreanoides. Sepia appellofi. 



9 Sepia sinensis d'Orbigny, 1839, united by Gray with S. inermis (van Hasselt), 

 is a name applied by d'Orbigny to a squid described in an article in the Encyclo- 

 pedic japonaise. Although Tryon follows Gray, it seems doubtful if the species 

 is in any way recognizable. 



10 Sepia chrysophtalmos Tilesius is a minute animal referred by d'Orbigny 

 (1839, p. 324, Loligopsis, pi. 1, figs. 2-4, fide Hoyle) to Loligopsis, but probably 

 impossible of determination. 



11 Sepia myrsus Gray (1849, p. 108) has been doubtfully listed in the Japanese 

 fauna by Hoyle (1886, p. 219), but I know of no other reference to its actual 

 occurrence there. 



