Edwardsiidae with elongate body divisible into physa, scapus and scapulus (capitulum?). Scapus with 12 longitudinal rows of solid papillae containing very large nematocysts. Tentacles more or less cylindrical, of ordinary length, hexamerously arranged, few (probably 12). No distinct siphonoglyphs. Mesenteries probably never more than six pairs. 8 macrocnemes arranged as the macrocnemes in Edwardsia and 4 microcnemes. Not more mesenteries proximally than distally. Retractors of the stronger mesenteries restricted, more or less kidney-like. Parietal muscles strong.
H. papillosus Carlgren 1937
Definitions and contained taxa are those of Oscar Carlgren as published in 1949 : Kungl Svenska Vetenskapsakadamiens Handlingar, Series 4, Volume 1, Number 1