SABELLIDAE 201 



Remarks. Almost the only character which is constant in this common and much 

 described Antarctic species is the bristles and hooks. Benham {loc. cit.) gives a good 

 account of the variation in this species, but he does not mention that the shape of the 

 collar and especially that of the ventral lappets also shows some variation. 



Genus Bispira, Kroyer 



Bispira magalhaensis (Kinberg). 



Sabella magalhaensis, Kinberg, 1857-1910, p. 72, pi. xxvii, fig. 5. 

 Bispira magalhaensis, Fauvel, 1916, p. 471, pi. ix, figs. 34-43. 



St. 55. 16. V. 26. Entrance to Port Stanley, East Falkland Island. 2 cables S 24° E of Navy 

 Point. 10-16 m. Gear BTS. Two specimens. 



St. 58. 19. V. 26. Port Stanley, East Falkland Island. 1-2 m. Gear RM. One specimen. 



Remarks. The largest specimen from St. 58 measures 33 mm. for the body and 12mm. 

 for the gills. The latter have their barbules coloured brown in an irregular manner. 

 This species is superficially very like Potamilla antarctica, but may be distinguished by 

 the following characters : the collar is lower, the branchiae are spirally coiled and have 

 their tips free from barbules, and the dorsal thoracic "scimitar" bristles are less 

 discoidal than the spatulate bristles of P. antarctica. 



Genus Dasychone, Sars 



Dasychone violacea (Schmarda), 



Augener, 1918, p. 580. 



Non Mcintosh, 1885, p. 504, pi. liii, fig. 3 ; pi. xxxi .\, figs. 7-8; pi. xxxix A, fig. 7. 



Dasychone foliosa, Ehlers, 1913, p. 572, pi. xlv, figs. 8-16. 



Branchiomma violacea, Johansson, 1927, p. 164. 



St. 90. 10. vii. 26. Simon's Town, False Bay, South Africa. Basin of H.M. Dockyard. 0-2 m. 

 Gear NH. One specimen. 



Remarks. The body measures 12 mm. and the gills 5 mm. The body colour is pale 

 violet and the gills a pale yellow except towards the tips, where there is a suggestion of 

 orange. Each filament has eight eye spots and there is a band of pigment around the 

 gill base. The collar is widely open dorsally and notched in the mid-ventral line and 

 at the sides. The dorsal appendages (stylodes) of the branchiae are as figured by Ehlers 

 {loc. cit. figs. 13 and 14). 



Dasychone capensis, Mcintosh, is not a synonym of this species, but is probably the 

 same as Dasychone cingulata, Grube. 



I heartily agree with Benham (1927, p. 137) in his refusal to follow Johansson in 

 transferring the generic name Branchiomma to Dasychone, and in substituting Mega- 

 lomma for Branchiomma. 



Dili 26 



