CEPHALOPODA OF THE HAWAIIAN ISLANDS. 311 



Type. — Sepia Loligo Linne 1758. As in the case of Polypus, Schneider mentions no type or other 

 species, but the clear inference is that Sepia loligo Linn6 was what he had in mind, a conclusion sup- 

 ported by the fact that this was the only species of true Loligo which was at that time possessed of a 

 binomial name. Because of the great uncertainty attaching to Linne's species, Hoyle considers L. 

 vulgaris Lamarck 1798 to be the type of Schneider's genus as it is that of Lamarck. 



[Loligo gain d'Orbigny 1835.] 



Loligo aahi d'Orbigny 1835. p. 60, pf. 3, fig. 1-2. 

 Loligo Gahi Tryon 1879. p. 144. 



Tryon gives us an alleged record of this species from the Hawaiian Islands in the following words: 

 "Specimens in Mus. Phila. Acad., said to come from the Sandwich Islands, agree well in the dentition 

 of the rings with this species. " As this is a characteristic Peruvian and Chilean species there is no doubt 

 that the citation is an error. 



Strangely enough the above is the only record I have been able to find of the presence of any member 

 of the cosmopolitan genus Loligo in Hawaiian waters, and I am unable even with the aid of the large 

 collection now in hand to affirm its occurrence there. 



Family SEPIOLID^E Keferstein 1866. 



Sepiolini Steenstrup 1861 {fide Hoyle). 

 Sepiolidtz Keferstein 1866, p. 1443. 

 Sepiolidaz Verrill 18S1, p. 347, 416. 

 Sepiolidae Joubin 1902. p. 80. etc. 

 Sepiolidce Pfeffer 1908, p. 24, 31. 

 Sepiolidce Naef 1912. p. 243. 244. 



Body short, thick, rounded posteriorly. Fins large, separate, ovate or rounded, attached laterally 

 near the middle of the body. Eyes with a thickened ventral fold or false lid, and sometimes a dorsal 

 fold as well. Median septum of mantle cavity reenforced by a pallial retractor muscle joining the 

 mantle to the body. Internal shell a very rudimentary uncalcified gladius, often entirely absent. 

 Eggs large and few. A photogenic gland is often present in the pallial cavity overlying the ink sac; 

 from it a luminescent secretion is emitted . 



Subfamily SEPIOLIN2E Naef 1012. 



Sepiolini Appellof 1898. p. 623. 

 Sepiolina Naef 1912, p. 246, 247 



Mantle margin united with head in nuchal region by a band-like commissure. Left dorsal arm 

 hectocotylized. Photogenic glands often absent; when present of elongate form, well separated, and 

 more or less lateral in position. 



Genus EUPRYMNA Steenstrup 1887. 



Euprymna Steenstrup 1887. p. 66. 

 Euprymna Steenstrup 18.57.1, p. 88-90 (42-44). 

 Euprymna Hoyle 1904, p. 24. 

 Euprymna Wiilker 1910. p. 9, 26. etc. 

 Euprymna Naef 1912. p. 247. 



Suckers of sessile arms in four rows, except at tip and extreme base; on tentacle club long 

 stalked, very minute, urceolate, and in very numerous (more than 16) rows. Nuchal commissure over 

 one-third as broad as the body. Left dorsal arm of male hectocotylized, the distal suckers closely 

 palisaded together and of very characteristic structure; the remaining arms differ from those of the 

 female in the possession of certain peculiarly enlarged suckers. Large elongate photogenic glands 

 present. Gladius wanting. 



Type. — Inioleulhis Morsei Verrill 1881 (species first mentioned), a common Japanese species. 



