THORACIC CIRRIPEDES COLLECTED IN 1925-1936 227 



The first five specimens in this table are typical pelagic forms. One of the Balanus 

 species, B. algicola, is here found fixed to a fish from the surface. It was at first de- 

 scribed as growing on algae, but later on I have found it fixed to the shells of mussels 

 from the littoral. The two remaining Balanus species are typical littoral forms. As 

 regards the bathymetrical distribution of the Scalpelliim species, it may be mentioned 

 that Scalpellum compactum and Scalpellum convexiim are here recorded from deeper 

 water than previously. Since our knowledge is incomplete, it is not possible to draw any 

 conclusions as to the bathymetrical distribution of the Scalpellum species here dealt 

 with. 



As regards the distribution of Cirripedes this material gives some results beyond those 

 arrived at in the former paper dealing with the Discovery material (Nilsson-Cantell, 



1930). 



Thus Scalpellum convexum is represented not only from South Georgia (where it was 



previously known to occur) but also from other parts of the Atlantic Ocean, viz. the 



South Sandwich and South Shetland Islands. 



Scalpellum rathbimae is now known from several localities east of Argentina from La 

 Plata down to Patagonia. This characteristic species is likely to be found later on in new 

 localities along the east coast of South America. 



Scalpellum compactum seems to be known from the southern part of the Pacific and 

 Atlantic Oceans, the Ross Sea and the Graham Land region. The specimens in this 

 collection are taken from a locality situated near the type-locality : McMurdo Sound. 



Scalpellum discoveryi, earlier noted from the Pacific, is, according to this collection 

 also found in the South Atlantic, thus indicating a circumpolar distribution. 



Two species of Scalpellum are new : S. scoresbyi and S. bouveti, the former from the 

 waters round the Falkland Islands, the latter east of Bouvet Island. 



Lepas australis, a typical pelagic species, is here represented from a locality (St. 

 WS 237) for which the depth is given as 150-256 m. The specimens have certainly been 

 caught by the net near the surface. 



Balanus maxillaris, earlier only known from South African waters, is here recorded 

 from the southern part of the Indian Ocean. 



Nothing of special interest need be added here regarding the distribution of the other 

 species in the collection. 



SYSTEMATIC 



Genus Scalpellum Leach, 1817 



Scalpellum gibberum C. W. S. Aurivillius, 1892. 



For synonymy see Nilsson-Cantell, 1921, Zool. Bidrag Uppsala, vii, p. 178. 



St. 53. 12. V. 26. Port Stanley, East Falkland Island. Hulk of 'Great Britain'. 0-2 m. GearRM. 

 One small specimen. 



St. 652. 14. ill. 31. Burdwood Bank, 54° 04' 00" S, 61° 40' 00" W. 171-169 m. Gear OTL, 

 Several specimens on Hydroids. 



