Haliphysena Tumanvitzii; living specimen showing the wineglass-shaped shell built up of sand-grains and sponge-spicules, and the abundant protoplasm p, issuing from the mouth of the shell and spreading partly over its projecting constituents.

Haliphysena Tumanvitzii

Haliphysena Tumanvitzii; living specimen showing the wineglass-shaped shell built up of sand-grains…