Elongate Halcampidae with the column divisible into physa, scapus and capitulum. Physa small, often flattened, not ampullaceous, probably without pores. Scapus with cuticle and tenaculi. Capitulum with scarce spirocysts. Sphincter simple, weak, extending a little into the base of the tentacles. Tentacles always more than 12, short. Siphonoglyphs indistinct. Mesenteries arranged at least in two cycles, divisible into macro- and microcnemes. Only the mesenteries of the first cycle perfect, fertile and with strong reniform to circumscribed retractors. Parietal muscles well developed. All mesenteries extended over the whole length of the column. Same number of tentacles and mesenteries. Cnidom: spirocysts, basitrichs, microbasic p-mastigophors.
C. abyssorum Danielssen 1890
C. arenaria Carlgren 1931
Halianthus chilensis Mc Murrich [sic] 1904
? Halcampoides aspera Stephenson 1918
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.