Name: Thaumactis medusoides
Reference: Fowler G. H., 1888, Plate XV , fig. 5
Caption: "Fig. 5.-Transverse section through the invaginated oral disc and stomatodæum at the base of a tentacle in a contracted specimen. The arrow indicates the plane of section in Fig. 6. The pair of mesenteries exhibit the protractor exoclic muscles in transverse section (compare their trend in Fig. 3). The laminated cuticle external to the ectoderm is probably only a mucous secretion. X 210."