[Summary:]
Spirorbis species from the South Atlantic Ocean are described. Species included which are already known to science are:
S. aggregatus Caullery & Mesnil,
S. claparedei Caullery & Mesnil,
S. falklandicus Pixell,
S. indicus Sterzinger,
S. lebruni Caullery & Mesnil,
S. levinseni Caullery & Mesnil,
S. moerchi Levinsen,
S. nordenskjoeldi Ehlers,
S. patagonicus Caullery & Mesnil,
S. perrieri Caullery & Mesnil and
S. pixelli Harris (
S. antarcticus Pixell). New species described for the first time in this paper are:
S. auricularis,
S. digitus,
S. flabellis,
S. focalis,
S. inventis and
S. scoresbyi. Some aspects of distribution of the species in the southern ocean and the significance of modes of incubation to bio-geographical distributions are tentatively discussed.
