Testa ovato-conica imperforata purpureo-albida laevigata, anfractibus convexis ultimo subangulato, apertura purpurea unifasciata.
Icon. --
Shell ovate conical, nearly smooth, with only a few concentric ridges, and distant, scarcely impressed, very narrow, grooves; white or purplish-white outside; the whorls rather convex, last one slightly angular in front; mouth ovate; throat purple or purplish-black with a distinct broad white spiral band just below the slight external keel; inner lip purple with a deep concavity behind it; spire acute half the length of the shell; axis 8/12, diameter 6/12, of an inch.
This shell has somewhat the shape of Littorina zigzag, the Trochus zigzag of Montague, but is all of one colour externally and has a much shorter spire.
49. Cerithium palustre, Brug. Dict. n. 19. Lam. Hist. 7 66.
Strombus palustris, Gmel. Syst. Nat. 3521. Number 38.
Icon. Lister. Conch. t. 836. f. 62. t. 837. f. 63. Seba, 3 t. 50. f. 13. 14. 17-19. Martini Conch. 4 t. 156. f. 1472.
50. Cerithium ebeninum, Brug. Dict. n. 26. Lam. Hist. 7 67.
Icon. Chem. Conch. 10 t. 162. f. 1548, 1549. Ency. Meth. t. 442. f. 1. a, b.
51. Cerithium morus, Lam. Hist. 7 75. not Brug.
Icon. Lister. t. 1024. f. 90 ?
52. Cerithium lima ? Lam. Hist. 7 77. Brug. Number 33.
A broken shell apparently of this species was brought home, but when a more perfect specimen is round, it may prove to be distinct from it.
53. Cerithium perversum ? Lam. Hist. 7 77.
54. Nassa fasciata, n.
Buccinum fasciatum, Lam. Hist. 7 271.