Amphigymnas

Walsh, 1891

2 species

Closely related to Synallactes, but its texture resembling a Deimatid. Skin thin, glass-like, filled with large deposits derived from tables. Spire 3-4 pillared with 1-2 cross beams and no teeth on top, often reduced or entirely absent, so the large plates resemble the plates found in the Deimatids; dorsally, large conical papillae, ventrally a lateral row of large conical pedicels, and a midventral row of smaller ones, filled with numerous supporting rods and a rudimentary end plate. (Deichmann, 1930)