Testacea

tes-tā′sē-a, n.pl. shelled or crustaceous animals.— adjs. Testā′cean (also n. ), Testā′ceo us , consisting of, or having, a hard shell.— ns. Test a cell′a , a genus of molluscs belonging to the Pulmonifera , and represented in Britain by three species; Testaceog′raphy , descriptive test ace ology; Testaceol′ogy , conchology. [L. test ace us — testa , a shell.]