Descriptions of two new marine species of the sand-dwelling testacean genus Corythionella: C. gwaii sp. n. and C. rachelcarsoni sp. n., and a revised description of C. acolla Gol. (Rhizopoda: Filosea, or Rhizaria: Cercozoa). Acta Protozoologica, 46(3) 2007: 269-278. 270 [Zoological Record Volume 144]