52 E. LÖNNBERG, ON THE CEPHALOPODS. 



the lateral cups of the three upper pairs af arms, which has 

 gone so far that they can very easily (PI. V fig. 4) be over- 

 looked especially in the larger of the specimens, in the smaller 

 of the two specimens they are a little more conspicuous 

 thanks to their long pednncles which attract the attention. 

 The hooks of the arms of G. antarcticus are more compressed 

 than those of G. fäbricii and the peduncle of the hook is 

 more prolonged, bnt the tip is not so strongly bent. 



The gladins in G. antarctius is also broader and a little 

 different in shape. 



The measurements of the two Patagonian specimens are 



as follows: 



»pec. x) exactloca . 

 frorn Pun- u Qn _ 

 taArenas. kiWn _ 



From tip of tail to dorsal anterior mantlemargin 170 mm. 88 mm. 



G-reatest breadth of body 31 » 21 » 



Breadth of head 31 » 18 » 



Length of fin 80 » 42 » 



Breadth of fins 75 » 45 



Length of first arm 66 » 39 » 



» second » 75 » 46 » 



» » third » 82 » 48 » 



» » fourth » 83 » 48 » 



» tentacle 130 >> 55 » 



The body is conical, comparatively stonter in the smaller 

 specimen, but in the larger continnally tapering from the 

 anterior mantle-margin to the posterior end. The fins are 

 heart-shaped broadly rounded in front and laterally, bnt in 

 the older specimen they are produced posteriorhy into a mnch 

 longer pointed tip than in the yonnger. The anterior man- 

 tle-margin is almost transverse, but projects slightly in the 

 dorsal median line and on each side of the shallow sinns for 

 the funnel. The mantle-margin of Gonatus fäbricii does not 

 show any projections at all according to the figures given by 

 Sars x and Steenstrup. 2 I also think that the pallial muscu- 

 lature of the antarctic form is weaker than in the arctic. 

 The head is short. The sinns of the eye reaches to the base 



1 G. 0. Sars: Moll. Reg. Arct. Norveg., Kristiania 1878, Tab. 31. 



2 Japetus Steenstrup: Prof. A. E. Verrills to nye Cephalopodsl. 

 Stheuoteuthis og Lestotenthis, Overs. K. Dansk. Yid. Selsk. Forhandl. Kjöben- 

 havn 1881, T. I. 



