SERPULIDAE 



213 



Sub-family FILOGRANINAE 



Genus Salmacina, Claparede 



Salmacina dysteri (Huxley), var. falklandica, var. nov. 



Salmacina dysteri (Huxley), Fauvel, 1927, p. 377, fig. 129 c-k. 



St. WS 85. 25. iii. 27. 8 miles S 66° E of Lively Island, East Falkland Island. From 

 52° 09' 00" S, 58° 14' 00" VV to 52° 08' 00" S, 58° 09' 00" W. 79 m. Gear OTC. Bottom: sand 

 and shell. Numerous specimens. 



Tlmm 



^O 



LmmL 



06 



mm 



O-L 



a b c 



Fig. 90. Salmacina dysteri, var. falklandica. 

 a. Collar bristle, b. Thoracic sickle bristle, c. Abdominal bristle. 



Description. A number of delicate, smooth, white tubes, more or less straight and 

 lying flat on several fragments of a calcareous Polyzoan. The contained worms agree 

 with the common S. dysteri except in the collar bristles (Fig. 90, fl), which do not show 

 the typical gap or notch above the toothed spur. In these specimens the teeth are 

 continued without interruption up the blade. Furthermore, the thoracic "sickle" 

 bristles (Fig. 90, b) appear to be denticulated, the serrations being real and not due 

 merely to the folding of the concave edge of the blade. There are seven thoracic chae- 

 tigers and each branchial lobe has four filaments. The abdominal bristles (Fig. 90, c) 

 are geniculate and denticulated. 



The bristles of this form diflPer sufficiently from those of the typical S. dysteri to 

 justify the creation of a new variety. They show affinities with the bristles of the 

 Spirorbids. 



As far as I know, 5. dysteri has not been recorded further south than Gough Island. 



