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Published through the yank Geophysical Union as a part of the Antarctic study Series.
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Carlgren, 1949, p. 81. Sicyonis antarctica: Carlgren, 1939, p. 795; 1949, p. 81. Description Body form and size. Column cylindrical (Figure 23), sometimes with circumferential constriction, so hourglass shaped, or tapering slightly toward basal end; those examined mostly 50-60 mm long and nearly as wide (but as small as 10 mm across). Body wall smooth except for shallow, irregular furrows; few specimens retain brownish or reddish brown ectoderm, most only in shallow wrinkles near pedal end; column white to pinkish in absence of ectoderm.
Because of these traits, a vagile nature, and catholic diet [Dearborn, 1977; Pratt and Dearborn, 1984], 0. victoriae is widely distributed and reaches high local densities. Species of Ascothorax Djakonov live within the genital bursae of their ophiuroid hosts. A partial revision of the genus with descrip tions of several new species has been produced recently [Grygier, 1983c]. Other taxonomic references on Ascothorax are Djakonov , Stephensen , Wagin [1947, 1968], and Heegaard .
Only in the possession of mesoectodermal longitudinal tentacle muscles, rather than ectodermal ones, does A. plebeia depart from Stephenson's [1920b] and RiemannZiirneck' s [1978b] definitions. This is a minor matter, easily remedied by rephrasing to include that possibility. Doumenc  questioned whether Actiner nus plebeius might be synonymous with the North Atlantic species Actinoscyphia saginata. Data from USARP specimens and from RiemannZiirneck' s [1978b] redescriptions prove that the species are distinct.