.MASSY. I C,| 



The chit inoiis lining ot the crop is present, and measures .'>() mm. bv .">."> mm., and 

 contains half an Aniphipod. and a considerable n^iantitv of ehopped-np green seaweed, 

 many of the fragments of which have 1'olv/oa and Spirorlii* attached to them. All 

 writers who have touched uiion the food of the Cephalopoda aimear to be unanimous in 



1 I 1 I I 



considering them to be whollv carnivorous. \arions reasons have been snu'u'ested to 

 me to account tor the presence ot this quantity of seaweed in the pre>cni specimen. 



For instance, owing to advanced age. and the apparently worn stale of the teeth, 

 had the animal taken to eating seaweed instead of harder things ( Secondlv. do the 

 carnivorous animals in the Antarctic have to supplement their carnivorous diet bv 

 seaweed? This is not likely, as animal food is apparently not deficient in Miiantitv 

 in these latitudes. Thirdly, is it possible that, in taking in other animals as food, 

 the Cephalopod accidentally engulfs snndrv unconsidered trifles, like seaweed, which 

 it would periodically get rid of when there was an inconvenient accumulation 

 in the crop '. 



With regard to the first and third ([iiestions. the facts that only half the Aniphipod 

 was present, and that the bits of seaweed were neatlv divided as if bv the scissors-like 

 action of the mandibles, point to the food having been methodicallv gathered rather 

 than accidentally engulfed, and. as it shows no trace of the rasping of u radula workino- 

 forwards, backwards, and laterally, it would seem that the teeth had not acted 

 makrially (possibly, however, because the animal may have hastily swallowed the food 

 from sudden fright at the time of capture). It should also be taken into consideration 

 that its sojourn in the rock-pool may have been an enforced one. o\vino- to injury, in 

 which ease the diet would be restricted to what could be got in a limited area. The 

 contents of the stomach and crop of all the large ( Vphalopnds dissected for the 

 present paper were examined, and the limited amount of evidence available goes 

 to show that animal and not vegetable matter forms the normal food of Antarctic 

 ( Vphalopods. 



Approximate dimensions m Millimetres. 



Lenjitli of liodv ....... . 1 7u 



Breadth of liody ......... L'O.'I 



Siphon ........ oO 



Anterior salivary glands . . . . . . . . lit x 14 



Anns *- 



1 . . . L'lu 



1 200 



; . . 185 



4 .220 



"' . . . 200 



<> . . . .210 



7 .... UK:. 



18(1 

 Diameter of largest surlier ...... 17 



All detached from liodv ami numbered I " t'm 



