Systema Naturae per regna tria naturae: secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis Author Linnaeus, Carolus text 1758 Laurentius Salvius Stockholm https://archive.org/download/mobot31753000798865/mobot31753000798865.pdf book 2C6327E1-5560-4DB4-B9CA-76A0FA03D975 https://doi.org/10.5962/bhl.title.542 3922206 Hydra campanulata [ spec. nov. ] H. nuda, tentaculis senis, involucro campanulato. � Amoen. acad. 2. p. 64. Polypus campanulatus integerrimus prolifer subcylindricus, ore setis obvallato. Baeck Act. Stockh. 1746. t. 6. f. 5, 6. Schaeff. monogr. 1754. t. 1. f. 4. Habitat ad Angliam. Utrum ad Zoophyta aut Lithophyta sit referenda, ulterius inquirendum.