CIRRATULIDAE 155 



St. MS 66. 28. ii. 26. East Cumberland Bay, South Georgia. 2J miles SE of King Edward 

 Point Light to i J cables W x N of Macmahon Rock. 18 m. Gear NCS-T. ? One specimen, young. 



St. MS }. South Georgia. Shore collection. One specimen. 



Remarks. The specimen from the South Georgia shore collection is a uniform deep 

 purple in colour. The specimen from WS 97 has the two groups of tentacular filaments 

 very forward in position, so that they appear to be on the last achaetous segment rather 

 than on the ist chaetiger. 



Cirratulus antarcticus, n.sp. 



St. 29. 16. iii. 26. West Cumberland Bay, South Georgia. 5-9 miles S 51° W of Jason Light. 

 23 m. Gear DC. Bottom: mud and stones. Ten specimens. 



St. 39. 25. iii. 26. East Cumberland Bay, South Georgia. From 8 cables S 81° W of Merton 

 Rock to 1-3 miles N 7° E of Macmahon Rock. 179-235 m. Gear N 4-T. Bottom: grey mud. 

 Five specimens. 



St. 45. 6. iv. 26. 2-7 miles S 85° E of Jason Light, South Georgia. 238-270 m. Gear NCS-T. 

 Bottom: grey mud. Four specimens. Gear OTL. Three specimens. 



St. 140. 23. xii. 26. Stromness Harbour to Larsen Point, South Georgia. From 54° 02' S, 

 36° 38' W to t;4° 11' 30" S, 36° 29' W. 122-136 m. Gear OTL. Bottom: green mud and stones. 

 Two specimens. 



Description. The largest complete specimen ^"^ ^mm. 



measures 26 mm. by 2 mm. The body is long 

 and rather slender with very crowded segments. 

 The prostomium is rather short and bluntly 

 conical ; it has no eyes ; the two achaetous seg- 

 ments behind the buccal segment are not clearly 

 distinguished. The first two chaetigers have no 

 branchiae. These begin on the 3rd chaetiger and 

 are continued over the greater part of the body. 

 Throughout they arise just above the dorsal 

 ramus. On the 3rd to 5th chaetigers there are 

 two groups of tentacular filaments, with six to 

 eight filaments in each group (Fig. 59). They 

 are rather stouter than the branchiae. The feet 

 carry capillary bristles only: there are no hooks. The pygidium is conical and the anus 

 is pointing upwards. 



Remarks. This species is allied to C. chrysoderma, Claparede, from the Mediterranean. 

 The body, however, is more massive and there are six to eight pairs of tentacular 

 filaments instead of two to three. Moreover, in C. chrysoderma the anus is ventral, and 

 the tentacular filaments are on the 4th-5th chaetigers. 



o 



Fig- 59' 



Cirratulus antarcticus. 

 Anterior end. 



