SABELLIDAE 199 



Terebellides longicaudatus, Hessle. 



Hessle, 1917, p. 139, pi. i, fig. 17, text-fig. 30 a-c. 



St. 27. 15. iii. 26. West Cumberland Bay, South Georgia. 3-3 miles S 44° E of Jason Light, 

 no m. Gear DL. Bottom: mud and rock. Seven specimens. 



St. 30. 16. iii. 26. West Cumberland Bay, South Georgia. 2-8 miles S 24° W of Jason Light. 

 251m. Gear DLH. Bottom: mud and stones. Four specimens. 



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

 Bottom: grey mud. Three specimens. 



St. 182. 14. iii. 27. Schollaert Channel, Palmer Archipelago. 64° 21' 00" S, 62° 58' 00" W. 

 278-500 m. Gear N 7-T. Bottom: mud. One specimen. 



Remarks. This species is distinguished by the reduction of the ist notopod and the 

 great development of the side lobes of the 3rd and 4th segments. The largest specimen 

 measures 95 mm. in length ; this is 20 mm. longer than the maximum hitherto recorded. 

 In some examples the dorsal bristles of the ist notopod are so much reduced that they 

 are enclosed in the tissue of the segment and only discoverable by dissection. One of 

 the specimens from St. 30 has 19 notopods. 



Family SABELLIDAE 



Sub-family SABELLINAE 



Genus Sabella, Linnaeus 

 Sabella pavonina, Savigny. 



Fauvel, 1927, p. 298, fig. 102 a-e. 



St. 91. 8. ix. 26. -5 mile off Roman Rock, False Bay, South Africa. 35 m. Gear NRL. Bottom: 

 sand. One specimen. 



Remarks. After prolonged examination, I cannot separate this specimen from the 

 European S. pavonina. It measures 28 mm. for the body and 9 mm. for the gills. There 

 are only six thoracic chaetigers. There are 14 pairs of gills with three bands of dark 

 brown pigment. The collar with its four lobes, the ventral pair being thick and fleshy, 

 is coloured dark brown on the inside. 



The sole difference that I can find between this specimen and a typical European 

 example is that in this specimen the collar slopes more sharply backwards from the 

 ventral to the dorsal surface, and thus leaves a greater part of the nuchal area exposed. 

 I see no trace of fleshy pads at the base of the branchiae. 



Augener records this species from Senegal. 



Genus Potamilla, Malmgren 



Potamilla antarctica (Kinberg). 



Potamilla antarctica, Gravier, 1907, p. 59, text-figs. 38-43. 



Potamilla antarctica (Kinberg), Benham, 1921, p. 109, with synonymy. 



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 OTL. Bottom: grey mud. Seven 

 specimens. 



