SVENSKA EXPEDITIONEN TILL MAGELLANSLÄNDERNA BD II N:0 2. 53 



of the third arm. The order of length of the arms can be 

 seen from the table of measurements, it is 4, 3, 2, 1. 



The ventral arms are webbed all along their lateral 

 margin. The suckers of the fourth pair of arms are provided 

 with comparatively long peduncles and armed with horny 

 rings bearing about ten pointed teeth in their distal half. 

 The middle ones of these are the largest. 



The third pair of arms have on the external side a 

 sinnt median web which is a little broader in the distal 

 portion. The hooks of the three upper pairs of arms are 

 very strong. Their shape can be seen from Fig. 4. The 

 small, almost rudimentary suckers of the outer rows of these 

 arms have long peduncles (Fig. 4), which are, at least basally, 

 more or less connected by a very thin web. The armature 

 of these suckers (Fig. 5) consists of horny rings with about 

 a dozen bluntly pointed teeth; although rudimentary in size, 

 they are thus normally armed. The armature of the suckers of 

 Gonatus antarcticus is therefore about the same as in G. fabricii. 



The buccal membrane is connected with all eight arms. 

 It is broad and has six points viz. one dorsal median and one 

 ventral median between the two dorsal and ventral connections 

 resp., and 4 lateral ones corresponding to the 4 lateral arms. The 

 outer lip is comparatively thin but the inner is thick and warty. 



The club of the tentacle is similar to that of Gonatus 

 fabricii. The suckers on the margin opposite the connective 

 apparatus are provided vith rather long peduncles and armed 

 with horny rings bearing about ten pointed teeth on their 

 distal half. The two large hooks are very strongly developed 

 and sharply pointed. The inner curvature of the largest hook 

 from the point to the proximal tip of its basal part is a 

 little more than half a circle. The largest hook measures 

 across the curvature (i mm. For other points I refer to the 

 figure given by Steenstrup (1. c.) of the club of Gonatus 

 fabricii because that could just as well serve as a figure of 

 the antarctic form. The small cups and corresponding tuber- 

 cles are on the distal part of the tentacular stein regularly 

 disposed in longitudinal series but proximally only scattered 

 cups are seen. 



About the general disposition of the organs is not much 

 to say as it, on the whole, is similar to the same of Gonatus 

 fabricii which is described by Hoyle (Proc. Zool. Soc. 1889). 



