246 DISCOVERY REPORTS 



It is very regrettable that the arms of the single specimen of O. marionis are all broken, 

 so that it cannot be seen whether the upper spines are transformed into hooks in the 

 distal part of the arms, as they are in O. dentatiis-purpureiis and O. nutrix, a character 

 which has an important bearing on the question of the validity of the subgenus or genus 

 Ophiolyciis (cf. my paper on the Echinoderms of South Africa, p. 315). If these spines 

 are not transformed into hooks in O. marionis this species will form a connecting link 

 between Ophiolycus and the typical Ophioscolex. 



Family OPHIACANTHIDAE 



Ophiacantha vivipara, Ljungman 



(Plate VII, fig. 2) 



Ophiacantha vivipara, Ljungman, 1870. On tvdnne nya arter Ophiurider. Ofvers. Vet. Akad. 



Handl., 1870, p. 470. 

 Ophiocoma (?) vivipara, Wyv. Thomson, 1877. The Atlantic, 11, pp. 241-4, fig. 50. 

 Ophiacantha vivipara, Ludwig, 1899. Ophiuroideen Hamburger Magalh. Sammelreise, p. 13. 

 O. vivipara, Koehler, 191 2. IP Exped. Antarct. Fran^aise. Echinodermes, p. 138, pi. xi, 



figs. 1-2, 10. 

 O. vivipara, Koehler, 1917. Echinodermes de Kerguelen. Ann. Inst. Oceanogr., vn, 8, p. 71. 

 O. vivipara, Mortensen, 1920. On Hermaphroditism in viviparous Ophiurids. Acta Zoologica, i, 



p. 10. 

 O. vivipara, Koehler, 1923. Swedish Antarct. Exped. Asteries et Ophiures, p. 105. 

 O. vivipara, G. A. Smith, 1923. Report on the Echinoderms coll. during the voyage of the ' Quest'. 



Ann. Mag. Nat. Hist., 9 Sen, xn, p. 368. 

 O. vivipara heptactis. Hertz. 1926. Deutsche Siidpolar-Exped. Ophiuroiden, p. 36. 

 O. vivipara, Koehler, 1927. Austral. Antarct. E.xped. Echinod. Ophiuroidea, p. 12. 

 O. vivipara, Grieg, 1929. Some Echinoderms from the South Shetlands. Bergens Mus. Arbok, 



1929, 3, p. 7. 

 For references to the older literature I may refer to Ludwig, op. cit. 



St. 27. 15. iii. 26. West Cumberland Bay, South Georgia, no m. Several specimens. 

 St. 39. 25. iii. 26. East Cumberland Bay, South Georgia, 179-235 m. 4 specimens. 

 St. 42. I. iv. 26. Off mouth of Cumberland Bay, South Georgia, 120-204 m. Several specimens. 

 St. 123. 15. xii. 26. Off mouth of Cumberland Bay, South Georgia, 230-250 m. 2 specimens. 

 St. 140. 23. xii. 26. Stromness Harbour to Larsen Point, South Georgia, 122-136 m. ca. 15 

 young specimens. 



St. 144. 5. i. 27. Off mouth of Stromness Harbour, South Georgia, 155-178 m. 4 specimens. 



St. 148. 9. i. 27. Off Cape Saunders, South Georgia, 132-148 m. i young specimen. 



St. 156. 20. i. 27. 53° 51' S, 36° 21' W, South Georgia, 200-236 m. 2 specimens. 



St. 159. 21. i. 27. 53° 52' S, 38° 08' W, South Georgia, 160 m. i specimen. 



St. 160. 7. ii. 27. Near Shag Rocks, South Georgia. 177 m. 5 specimens. 



St. 170. 23. ii. 27. Off Cape Bowles, Clarence Island, 342 m. 10 specimens. 



St. 175. 2. iii. 27. Bransfield Strait, South Shetlands, 200 m. 2 specimens. 



St. 190. 24. iii. 27. Bismarck Strait, Palmer Archipelago, 93-130 m. 3 specimens. 



St. 474. 12. xi. 30. Off Shag Rocks, South Georgia, 199 m. 12 specimens. 



St. 599. 17. i. 31. 67° 08' S, 69° 06' W, 203 m. I specimen. 



St. 652. 14. iii. 31. Burdwood Bank. 171-169 m. i specimen. 



St. 1562. 7. iv. 35. 46° 53' S, 37° 55' E, off Marion Island, 90-97 m. 4 specimens. 



St. 1563. 7. iv. 35. 46° 48' S, 37° 39' E, off Marion Island, 113-99 m. 6 specimens. 



