BioStor
 | The structure and relationships of certain eleutherozoic Pelmatozoa Edwin Kirk (1911) Proceedings of The United States National Museum 41: 1-137 |
 | XXV.—Some observations on Pleurocystis cuénoti, Hesse, 1909, a Cœlozoic parasite of the earthworm W Harold Leigh-Sharpe (1919) Annals And Magazine of Natural History 3: 256-262 |
 | Amecystis, a new genus of Ordovician Cystidea E O Ulrich and E Kirk (1921) Proceedings of The Biological Society of Washington 34: 147-148 |