EEPOET ON THE CEPHALOPODA. I43 



The Body is long and narrow, widest near the anterior margin, and tapers gradually 

 backwards. The Jin is very narrow, only one-eighth the breadth of the body; it 

 commences 3 mm. from the margin of the body, and posteriorly passes on to the 

 ventral surface, and terminates 2 mm. from its fellow and 4 mm. from the extremity 

 of the body. The mantle-margin has a narrow projection over the head, and is evenly 

 truncated ventrally. The siphon is short, reaching barely halfway to the space between 

 the ventral arms. 



Fig. 1. Sepia koUetms ; side view, showing how the iins termiuate ou the ventral surface of the body. 



Tlie Head is of medium breadth, and the eyes prominent laterally. 



The Arms are subequal, the order of length being 2, 4, 1, 3(?), and less than one-third 

 the length of the body ; the first two pairs are subconieal and slender, the third broader 

 and with a web running up the ventral aspect, the fourth wider .and with a distinct 

 ridge along the outer edge ; they all taper to very fine points. Many of the suckers are 

 deficient, but they seem to have stood in four series throughout ; they are spheroidal 

 (fig. 11) and very obhque, the distal margin of many has a deep notch (fig. 10) ; the 

 horny ring is smooth in most cases, but occasionally possesses a few angular teeth. The 

 specimen being a female no hectocotylus is present. The umbrella is but little developed, 

 its greatest extent being between the ventro-lateral arms, where it reaches the fourth 

 row of suckers. The buccal membrane has the usual seven points, the two ventral being 

 the least distinct (as usual in female specimens); the spermatic pad is small. The 

 outer lip is narrow, the inner thick and papillate. 



The Tentacles are shorter than the body and slender ; the stem has three sides, the 

 inner being slightly hollow, with a slender fillet along the middle. The club (fig. 9) is 

 slightly expanded with a distinct protective membrane ; the inner side of the club is 

 deeply grooved, and internally to the groove is a rather broad fin. The suckers are 

 in about five series, near the inner margin are three rather larger than the xest} which 

 gradually diminish towards the outer margin. The horny rings of the larger suckers have 

 about twenty fine teeth on the distal semicircumference, the smaller have fewer in pro- 

 portion. 



The Surface is smooth all over. 



Tlie Colour is a dark purplish grey above, paler below. 



The Shell (figs. 12-14) is a very elongated oval in outline; the chitinous margin is 

 very narrow and is uncovered over one-third of the dorsal surface, which is smooth and 

 evenly convex, with the exception of a slight ridge along the middle line ; the ventral 



' Not adequately shown in the figure. 



