Edwardsiidae with the body divisible into physa, scapus and capitulum (scapulus?). Scapus and physa slightly differentiated from each other, the former with a thin epidermis (mucus-membrane?) without nemathybomes. No sphincter. Tentacles short, the inner shorter than the outer ones. 8 perfect and fertile mesenteries arranged as the macrocnemes in Edwardsia. Several microcnemes. Not more mesenteries distally than proximally. Retractors of macrocnemes reniform to circumscribed. Parietal muscles distinct but weak. No nematosomes in the coelenteron.
Milne-Edwardsia akkeshi Uchida 1932
Definitions and contained taxa are those of Oscar Carlgren as published in 1949 : Kungl Svenska Vetenskapsakadamiens Handlingar, Series 4, Volume 1, Number 1