Mollusca.] 
NATURAL HISTORY. 
483 
46. Natica conica, Lam. Hist. vi. pt. 2. 198. 
Icon. Chemn, v. t. 189. f. 1930. 1931. 
47. IiiTTORiNA Australis, (n. s.) Sr . ’ 
Testa ovata, conica fulva rudis spiraliter striata sulcata^ ^ 
spird acuta, fauce lividd. 
Shell ovate, conical, fulvous-brown, roug-h, with numerous im- 
pressed spiral lines ; the spire acute, the whorls rather convex, 
last slightly angular, the columella lip purplish-brown ; axis solid, 
with a lunate concavity behind the usual situation of the umbilicus. 
48. LiTTORINA UNIFASCIATA, (n. S.) LCd-roT-rPeHr \ ^ 
Testa ovato-conica imperforata purpureo-atbida lavigata, - 1* 
anfractibus convewis ultimo subangulato, aperturd pur- 
pured unifasciatd. 
Icon. 
Shell ovate conical, nearly smooth, with only a feW concehtric 
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 diameter 
of an inch. 
This shell has somewhat the shape of Littorina zigzag, the 
Trochus zigisag of Montague, but is all of one colour externally 
and has a much shorter spire. 
49. Cerithium paluStre, Brug. Diet. n. 19. Lam. Hist. vii. 66. 
Strombus palustris, Gmel. Syst. Nat 3521. No. 38. 
Icon, Lister. Conch, i. 836. f. 62. t. 837. f. 63. Seba, iii,. 
t. 50. f. 13. 14, 17 — 19. Martini Conch, iv. t. 156. f. 1472. 
50. Cerithium ebeninum, Brug. Diet. n. 26. Lam. Hist. vii. 87. 
Icon. Chem. Conch. X. t. 162. f. 1548, 1549. Ency. MHh. 
t. 442. f. 1. a, b. 
51. Cerithium morus, Lam. Hist. Vii. 75. not Brug. 
Icon. Lister, t, 1024. f. 90 ? 
212 
