REPOET ON THE CEPHALOPODA. 139 



The shell of tliis species is peculiar in having a spine as well as, near to but distinct 

 from it, a keel, upon the dorsal aspect of the shell. Sepia elegans, d'Orb., has the keel 

 but no spine, while an unnamed specimen from the Cape in the Copenhagen Museum has 

 a stronger keel reaching quite up to the spine, which is larger and thinner than in this 

 specimen. 



The tentacular club is like that of Sepia hrevimana, Steenstrup. 



The integument in the middle of the back has been pierced down to the shell by a 

 neat round hole, presumably the work of some parasite (see fig. 2). 



Sepia andreanoides, Hoyle (PL XXI. figs. 11-19 ; PL XXII. fig. 11). 



1885. Sepia andreanoides, Hoyle, Diagnoses II., \). 193. 

 1885. „ „ Hoyle, Prelim. Eep. II., p. 297. 



Habitat. — Japan. Purchased in the market, Yokohama. Three specimens, one $ , 

 two ? . 



The Body is very long, broadest one-third of the way back, pointed and acuminate 

 behind. The fins are narrow, they commence 3 mm. behind the anterior margin, and 

 terminate 5 mm. from the posterior end of the body, and, approaching within 3 mm. of 

 each other, extend a little distance upon the dorsal aspect of the body. The mantle- 

 margin extends well over the head dorsally, and is very slightly emarginate ventrally. 

 The siphon extends about as far forward as the middle of the eyes, but not up to the 

 space between the ventral arms. 



Tlie Head is decidedly narrower than the body and somewhat elongated ; the eyes being 

 distended and laterally prominent. 



The Arms are subequal, the order of length being 1, 2, 3, 4, or 1, 4, 3, 2 ; they are 

 two-fifths the length of the body, elongated, conical (except the fourth pair, which are 

 flattened), and taper to very slender tips. The suckers seem to be normally in four series, 

 but in some cases the arms are so compressed that they appear to be in only two, 

 especially at the proximal extremities of the first and second arms ; they are globular, 

 slightly oblique, with a small aperture and smooth horny ring (fig. 17). The distal half of 

 the left ventral arm of the male is hectocotyUsed (PL XXII. fig. 11); the suckers are normal 

 up to the twelfth row, after which the arm widens and has a median groove from which 

 about twelve shallow grooves pass outwards on either side, separating raised portions, each 

 of which bears a minute sucker on the dorsal side of the groove. The umbrella is present 

 only between the second and third and third and fourth arms up to the fourth row of 

 suckers. The buccal membrane is well developed and has the usual seven points ; in 

 the female there is a deeply grooved spermatic pad. The outer lip is thin and smooth, 

 the inner thick and papillate. 



The Tentacles are somewhat longer than the head and body, very slender and some 



