a. (sb.) Zool. [f. mod.L. Thelphūsa + -IAN.] Of or pertaining to the genus Thelphusa of fresh-water crabs, as T. fluviatilis, which burrows in river banks. b. sb. A crab of this family.
1842. Penny Cycl., XXIV. 305/2. Thelphusa, Thelphusians, M. Milne Edwards’s name for a tribe of brachyurous crustaceans belonging to his family of Catometopes. Ibid. Many of the Thelphusians.
