62 THE VOYAGE OF H.M.S. CHALLENGED. 



margin (fig. 3). The mantle-oioening is horse-slioe-shaped, and closely embraces the 

 base of the siphon, which is long, thin, and conical (fig. 3). 



Tlie Head is exceedingly short, and the eye appears to occupy all the available space 

 between the fin and the arms. 



The Arms are subequal, thick, rounded, and soft, and taper rapidly towards the 

 extremities. The umbrella is attached directly to the arms, which are somewhat more 

 prominent on its inner than on its outer surface ; it is attached to the dorsal aspect of 

 every arm almost to the tip, and to the ventral aspect for somewhat more than half its 

 length, and at this latter attachment is a firm nodule of cartilaginous consistency (fig. 2). 

 The suckers are about fifty-two in number, and commence close to the oral lip, and the 

 first half-dozen stand near together ; halfway up the arms they are farther apart, and the 

 largest are situated opposite the attachment of the membrane to the ventral aspect of the 

 arms ; they are prominent, but not so hard and firm as those of Cirroteuthis magna : 

 there are faint radial markings upon them. The cirri commence on the dorsal arms 

 between the seventh and eighth suckers, and continue till the last ; on the ventral arms 

 they commence between the sixth and seventh, and here also are continued to the tips 

 of the arms ; they begin as small papillae, and gradually increase in length, attaining the 

 maximum about halfway along the arms. 



TTie Surface is smooth. 



The Colour is a deep purplish-madder, paler outside the umbrella and on the fin. 



The Jaws are shown in PI. X. figs. 4, 5. 



Dimensions. 



Length of fin. 



Breadth of one fin from origin to tip, 



Length of siphon. 



Diameter of largest sucker, 



Length of longest cirri, . 



Length of first arm, 

 Length of second arm. 

 Length of third arm, 

 Length of fourth arm. 



The only specimen representing this species is sadly mutUated ; the whole body has 

 been removed, leaving only one fin, one eye, and the siphon. It is readily distinguished 

 from the last by the much greater thickness and solidity of the arms and the smaller com- 

 parative size of the suckers, and by the fact that the web is very narrow between the 

 several arms, and does not admit of their being widely separated (this may be due to the 

 action of the spirit); it is attached directly to each side of the arms, one web not being 

 joined to the other so as to constitute an intermediate web. As in that form, however, it 



15 



mm. 



55 



„ 



15 



„ 



2- 



5„ 



5 



„ 



Eight. 



Left. 



170 mm. 



145 mm 



140 „ • 



155 „ 



130 „ 



140 „ 



150 „ 



135 „ 



