58 



THE VOYAGE OF H.M.S. CHALLENGEE. 



Dimensions. 



Length, total, 



End of body to mantle-margin, 



End of body to eye. 



Breadth of body, . 



Breadth of head, . 



Eye to root of fin, 



Length of fin. 



Breadth of fin (extreme), . 



Breadth of intermediate Tveb, 



Diameter of largest sucker, 



Length of longest cirri, 



Breadth of dorsal cartilage, 



Length (greatest antero-posterior), 



„ (median), . 

 Thickness (dorso-ventral). 



Length 

 Length 

 Length 

 Length 

 Length 

 Stickers 

 Suckers 

 Suckers 

 Suckers 



of first arm, 

 of second arm, 

 of third arm, 

 of fourth arm, 

 of free tip of arms, 

 on first arm, 

 on second arm, 

 on third arm, 

 on fourth arm, 







1155 mm. 









163 









175 









125 







about 100 









126 









76 









513 









180 









8 









80 









100 









50 









20 









20 





Eight. 



Left. 



875 mm. 



875 mm 



. 870 





875 „ 



. ■ 870 





890 



, 



. 838 





915 



, 



about 30 





30 



, 



. 103 





80 



, 



83 





88 



, 



. 103 





102 



, 





84 





85 



, 



The species just described is based upon only two specimens ; the smaller is in a very 

 fragmentary condition, but the larger is of special interest as being, so far as I am aware, 

 by far the largest of the genus hitherto known ; the fine series of Cirroteuthis miilleri in 

 the Copenhagen Museum contains none more than 40 cm. in extreme length. 



StUl larger dimensions must, however, be sometimes attained by the genus, as is 

 proved by the suckers which were removed from a dead specimen floating on the surface, 

 and which measured nearly twice as much in diameter as those of the present individual 

 (see p. 66). 



The arrangement of the web needs perhaps a little further description. Commencing 

 with the portion between the two dorsal arms, it extends almost up to their extremities, 

 only a very slender tapering portion projecting beyond it (PL XII. fig. 2, and woodcut 2). 

 The arms themselves appear to be thickenings of the margin of the web for the reception 

 of the suckers, rather than independent structures ; they are about 25 mm. wide, 

 thickened at the free margin where the suckers are inserted, and becoming gradually 

 thinner as they pass into the web. A curved line (^, i, woodcut 2) may be seen passing 

 along the membrane on either side from near the mouth to a point about two-thirds up 

 the arm ; this line is the attachment of the web extending between the dorsal and dorso- 



