26 LITTORINIDiE. 



called Littorina, belong to quite other genera, nor do we 

 believe that any true paljrozoic examples of the genus have 

 as yet been discovered. 



L. NERiTOiDES, Linnaeus. 



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

 much shelving, flattish, 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. 



Tiirbo Neritoides, Linn. Syst. Nat. ed. 12, p. 1232. — Philipi'I, Weigm. Arcliiv. 



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

 Helioc jxtraea, MoNT. Test. Brit. vol. ii. p. 403. 



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

 Dorset Catalog, p. 49, pi. 18, f. 13. — Tl'rt. Conch. Diction, 

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

 Conch, p. 165.— DiLLW. Recent Shells, vol. ii. p. 820. — Wood, 

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

 p. 301. 

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

 Turbo cwrulescetis. Lam. Anim. s. Vert. (ed. Desh.) vol. ix. p. 217. — Bi.ainv. 

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

 Sicil. p. 102. — Philippi, Moll. Sicil. vol. i. p. 189.— 

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

 Hissoa elegans, Risso, H. N. Europe Mer. fig. 46 (not of text). 

 Paludina glahraia, Ziegl. in C. Pfeif. Deutscb. Land und Slisswas. Moll. pt. .''>, 



pi. 8, f. 9, 10. 

 Littorina ccBrulea, CosTA, Osserv. Zoolog. 



„ petrcsa. 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. 

 „ ccerulesccns, 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 



