Actiniidae with well developed pedal disc. Column elongate, smooth, without spherules or verrucae. Sphincter diffuse. Tentacles long, hexamerously arranged, occupying only the outer half of the oral disc, each provided with an endodermal sphincter at its base, by the contraction of which it may be thrown off; the longitudinal muscles ectodermal. Siphonoglyphs well developed. Perfect pairs of mesenteries more or less numerous, 2 pairs of directives. Retractors diffuse. Distribution of the gonads variable. Mesenteries not more numerous at the margin than at the limbus. Cnidom: spirocysts, basitrichs, microbasic p-mastigophors.
Actinia Tuediae [sic] Johnston 1832
B. maxima Carlgren 1921
B. occidua Mc Murrich [sic] 1893
B. capensis Carlgren 1928
B. kerguelensis, Studer 1878
B. somaliensis Carlgren 1928
B. pannosa Mc Murrich [sic] 1893
?Polystomidium patens Hertwig 1882
Definitions and contained taxa are those of Oscar Carlgren as published in 1949 : Kungl Svenska Vetenskapsakadamiens Handlingar, Series 4, Volume 1, Number 1
Electronic version made possible by NSF grant DEB95-21819 in the PEET program to D. G. Fautin.