26 LITTORINID.E. 



called Littoriua;, belong to quite other genera, nor do we 

 believe that any true palrcozoic cxamjiles of the genus have 

 as yet been discovered. 



L. NERITOIDES, LinusBus. 



Small, smooth, ovate-conic ; usually more or less black ; whorls 

 much shelving, Hattish, or merely convex ; spire short, but acute. 

 Mouth angularly contracted posteriorly : outer edge of the pil- 

 lar lip but little if at all concave ; throat very dark. 



Plate LXXXIV. fig. 1, 2. 



Turbo Neritoiiks, Linn. Syst. Nat. ed. 12, p. 1232. — Philiu'i, Weigni. Archiv. 



Nat. 1841, pt. 1, p. 271 ; Moll. Sicil. vol. ii. p. 159. 

 Helix petraa, Mont. Test. Brit. vol. ii. p. 403. 



Turbo pctrcBtis, Maton and Rack. Trans. Linn. Soc. vol. viii. p. 160. — Rack, 

 Dorset Catalog, p. 49, pi. 18, f. 13. — Turt. Conch. Diction, 

 p. 198. — Fleming, Brit. Animals, p. 298. — Brit. Marine 

 Conch, p. 165. — Dillw. Recent Shells, vol. ii. p. 020. — Wood, 

 Index Testae, pi. 30, f. 13. — Blainv. Faune Francj. Moll, 

 p. 301. 

 Littorina Uusleroti, Pavraud. Moll. Corse, pi. 5, f. 19,20. 

 Turbo cwrulescens. Lam. Anim. s. Vert. (ed. Desh.) vol. ix. p. 217. — Blainv. 

 Faune Franq. Moll. p. 302, pi. 12, f. 9. — Costa, Test. 

 Sicil. p. 102. — Philippi, Moll. Sicil. vol. i. p. l,'i9. — 

 Deles. Rec. Coquil. Lam. pi. 37, f. 6. 

 Rissoa elcffans, Risso, H. N. Europe Mer. fig. 46 (not of text). 

 Pahidina gktbrata. Ziegl. in C. Pfeif. Deutsch. Land und Susswas. Moll. pt. 3, 



pi. 8, f. 9, 10. 

 Littorina cwrulea, CosTA, Osserv. Zoolog. 



„ petraa. Gray, Zoolog. Proc. 1833, p. 116. — Johnston, Berwick. Club, 

 vol. i. p. 269. — Macgilliv. Moll. Aberd, p. 139. — Hanl. 

 Brit. Marine Conch, p. xxxix. -Brown, Illust. Conch. G. B. 

 p. 16, pi. 10, f. 17. — Alder, Cat. Moll. Northumb. and 

 Durh. p. 56. 

 „ caruhscens, Potiez and Mich. Galerie Douai, Moll. p. 227. 

 „ Neritoides, Philippi, Neue Conch, vol. ii. p. 166, Lit. pi, 3, f. 20. 



Our examination of the Linnsean collection has con- 

 firmed the accuracy of Philippics determination of this 

 often-named shell. The original specific appellation is 



