2. cărīno, āvi, ātum, 1, v. a. [carina, II. B.], to supply with a shell; with se, of mussels, to get shells, Plin. 9, 33, 52, § 103.
Hence, P. a.: cărīnātus, a, um, keelformed, shell-formed: concha acatii modo, Plin. 9, 30, 49, § 94: pectus animalium, id. 11, 37, 82, § 207.