OCTOPODIDAE 389 



St. 45. 6. iv. 26. 27 miles S 85 E of Jason Light, South Georgia. 238-270 m., grey mud. Large 

 otter trawL- one 9 (Brit. Mus. 3). Three <S3 (Brit. Mus. 13). 



St. 123. 15. xii. 26. Mouth of Cumberland Bay, South Georgia. 230-250 m., grey mud. Large 

 otter trawl: one $ (Brit. Mus. 7). 



St. 140. 23. xii. 26. Stromness Harbour to Larsen Point, South Georgia. 122-136 m., grey mud 

 and stones. Large otter trawl: one $ (Brit. Mus. 15). 



St. 154. 18. i. 27. Jason Harbour to Larsen Point, South Georgia. 60-160 m., mud. Large otter 

 trawl: one ? (Brit. Mus. 6). 



St. WS 25. 7. xii. 26. Undine Harbour (North), South Georgia. 18-27 "i-i "i^'i ^^'^ sand. Small 

 beam trawl: one <? (Brit. Mus. 16). 



St. WS 32. 21. xii. 26. Mouth of Drygalski Fjord, South Georgia. 225 m., grey mud. Small 

 beam trawl: one ? (Brit. Mus. 8). 



The body is usually plump and the head narrow, the mantle index averaging 116-93, 

 that of the head 84-60. The average form of the head and body is thus very like that 

 figured by Joubin. The arms are short, 72-76 per cent of the total length. The suckers do 

 not vary in diameter as between males and females (range 12-8-3 per cent). The web is 

 42-22 per cent of the arms. E tends to be larger than A, and C is the deepest. There is 

 usually a trace of a lateral keel. The sculpture is very variable. It should be noted here 

 that Joubin's earlier description dealt with a heavy sculpture of closely apposed boss- 

 like tubercles. His later description was of a more granular sculpture (cf. 1914 [?], fig. i). 

 In the material before me I find a similar variation which may be tabulated as follows : 



Brit. Mus. 3 : rather isolated warts, nearly obsolete apically; warts present on inner side of arms; 



} ocular cirrhi. 

 Brit. Mus. 12: large (not close) and granular warts; ocular cirrhi absent. 

 Brit. Mus. 7: warts ? originally well developed, though widely spaced, now very much worn; ocular 



cirrhi present. 

 Brit. Mus. 8: warts very small; ocular cirrhi. 

 Brit. Mus. 15 = 3: ocular cirrhi present. 

 Brit. Mus. i6: warts granular; ocular cirrhi. 

 Brit. Mus. 13 = 3: but warts sparser; ocular cirrhi. 

 Brit. Mus. 10: (two specimens too much wrinkled to examine). Small close warts; ocular cirrhi 



present. 



The specimens from the ' Terra Nova ' collection are more regularly warty and less 

 granular than the Discovery ones, and I think are nearer Joubin's heavily sculptured form. 



The funnel-organ is V V-shaped and, as indicated by Massy, the limbs are coarse and 

 thick, though they are not always so coarse as is seen in her figure. There are eight to 

 eleven filaments in each demibranch. The hectocotylus is 8-1 1 per cent of the arms. 

 The calamus is well developed and acute, the ligula usually well excavated, with thick 

 sides. A number of rather feeble laminae are present. The hectocotylus, it should be 

 noted, is far more like that of Octopus than are those of the European forms, which lack a 

 calamus. I suggest that the Antarctic forms are more archaic in this respect. The penis 

 in two specimens (10) was short and coarse, and bears a large saccular diverticle con- 

 taining an enormous spermatophore, about 82 mm. long, and very thick (cf. Massy, 

 1916, p. 153). 



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