REPORT ON THE CEPHALOPODA. 



193 



about oue-fiftli the lengtli of the body ; they are slender, tapering and rounded, and 

 neither keeled nor webbed. The suckers are in two series, spheroidal, and pro^dded with 

 smooth horny rings (fig. 6). 



The Tentacles (fig. 9) are about three-fourths as long as the body, slender, 

 cylindrical, not expanded into a distinct club ; the extremity bears four series of 

 suckers, the marginal ones being a little smaller than the median. The suckers 

 (fig. 7) are of quite normal shape, and the horny I'ing both of the median and 

 marginal ones bears four strong bluntly pointed teeth (figs. 7, 8). 



The Surface is smooth throughout. 



The Colour is pale, almost white, and the mantle semitransparent even when 

 preserved, no doubt quite so when living ; a number of oblong chromatophores are 

 arranged in about eight transverse rows (fig. 5). 



The Gladius, so far as could be ascertained without extraction, does not difi"er 

 materially from that of the other species of the genus. 



Dimensions. 



Length, total, 



End of body to mantle-margin, 



End of body to eye, 



Breadth of body, . 



Breadth of head, . 



Breadth of head across the eyes. 



Length of fin, 



Breadth of fin. 



Length of first arm. 

 Length of second arm, 

 Length of third arm. 

 Length of fourth arm, 

 Length of tentacle. 



82 mm. 



42 





45 





12-5 





3 





11 





7 





4 





Eight. 



Left. 



5 mm. 



5 mm 



6 „ 



6 „ 



8 „ 



8 „ 



8-5 „ 



8-5 „ 



3 „ 



37 „ 



The three small specimens taken in the Southern Ocean demand a careful discussion, 

 inasmuch as they and the drawing by Dr. v. Willemoes-Suhm, reproduced in the 

 accompanying woodcut (fig. 9), were made by Professor Lankester the basis of a new 

 genus, Procalistes, characterised as follows : — " Similar to Cranchia, excepting that the 

 eyes are pedunculate, that the shorter perioral arms are aborted, and that the longer 

 (so-called prehensile) arms are devoid of suckers. In the youngest stage observed there 

 are two rows of suckers on the long arms, and six isolated and pedunculated suckers 

 surrounding the mouth, which appear to represent the shorter arms of other 

 Cephalopods. " 



The capture of these individuals is thus alluded to in Dr. v. Willemoes-Suhm's MS. 

 journal. 



(ZOOL. CHALL. EXP. — PART XLIV.- 



'■) 



Xx25 



