^ Challenger^ Cephulopoda. 189 



The Tentacles are absent. 



The Surface is smooth throughout. 



The Colour is dull grej, mottled with black above, yellowish 

 below. 



The Shell is elliptical in outline^ somewhat broader behind 

 (especially in the female) ; the chitinous margin is narrow 

 and does not form a complete ridge across the shell below 

 the spine ; it forms two slightly expanded wings behind, and 

 extends but a little distance over the dorsal surface^ which is 

 marked with coarse rugosities disposed in curved lines 

 parallel to the anterior margin ; a distinct but low rib runs 

 down the centre. The ventral surface is elevated on either 

 side of a deep median groove ; the last loculus covers about 

 one fifth of the surface, and is bounded posteriorly by two 

 slightly wavy lines, meeting at an acute angle ; the striated 

 area is long, and the angle between the strise widens poste- 

 riorly. The inner cone is very well developed ; the linibs 

 arise one fifth of the length of the shell forward, and gradually 

 become more elevated until they enclose a deep conical cavity. 

 The spine is strong, pointed, and somewhat curved laterally 

 in the female example. 



Hah. Japan; purchased in the market at Yokohama. Two 

 specimens, 1 c? j 1 ? . 



Sepia ellipticaj n. sp. 



The Body is ovoid, broadest one third from the anterior 

 margin, pointed behind. The fins are one third the width of 

 the body, broadest in the middle, extending the whole length of 

 the body, and approaching within 2 millim. of each other 

 posteriorly. The mantle-margin not very prominent over 

 the head dorsally. The mantle-connective is rather short and 

 deep, but otherwise normal. The siphon is conical, reaching 

 within 1 millim. of, or quite up to, the space between the 

 ventral arms. 



The Head is very short and broad, the eyes prominent. 



The Arms are subequal, the order of length being 4, 3, 2, 

 1 ; they are nearly half the length of the body, and taper 

 evenly to fine points ; there is a distinct but narrow ridge 

 along the fourth and a delicate web along each side of the oral 

 aspect of the arms. The suckers are in four series throughout, 

 and of moderate size, marked with inconstant meridional 

 grooves, and there is a large notch proximally and distally in 

 the rim. The horny ring has for the most part no distinct 

 teeth, but is marked in the distal half with shallow irregular 

 notches, which are occasionally more regular. A papillary 



Ann. & Mag. N. Hint. Ser. 5. Vol. xvi. 14 



