CINGULA SEMISTRTATA. 639 



1874. Alvaiiia stibsfriafa, Seguenzii, Boll. K. Com. Geol. Ital., vol. v, p. 6. 



1884. Rissoa substriata, Jeffreys, Proc. Zool. Soc. London, p. 126. 



1890. Rissoa (Cingula) substrlafu, Cams, Prod. Faun. Medit., vol. ii, p. 337. 



1893—98. Rissoa sxhsfriata, A. Bell, Proe. Roy. Irish Acad. [3], vol. ii, p. 629, 1893; Trans. Roy. 



Geol. Soc. Cornwall, vol. xii, p. 152, 1898. 

 1898. Rissoa (Oingula) siibstrlaJa., Buoquoy, Dautzenberi;- et DoUfus, Moll. mar. Rouss., vol. ii, p. 797. 



Sjiccific CJuirdj-fprs. — Shell minute, smooth, ovate ; whorls 5, the last ventricose ; 

 the upper ones without or with inconspicuous longitudinal sculpture, otherwise 

 ornamented throughout by excessively fine striation (hardly visible without the aid 

 of a lens) extending to the base, where it is rather stronger; suture sliglit; mouth 

 large, ovate ; umbilical fissure very small. 



Dimensions. — L. 25 mm. B. 1"25 mm. 



Bistribntioii. — Recent: Gulf of Lyons, Marseilles. "Porcupine" Expedition. — 

 Atlantic, Tangier, Mediterranean. 

 Fossil : St. Erth. 



Pleistocene : Livorno, Calabria, Reggio. Sicily — Ficarazzi, Monte Pellegrino. 



BemarJiS. — The specimen figured under this name is from the British Museum, 

 and was obtained at St. Erth, I believe, by Mr. A. Bell. G. siihstriata is a recent 

 and rare form distinguished by its excessively fine spiral sculpture, a single 

 specimen of which was found originally by Philippi at Panormi in Sicily, and 

 since then in the Pleistocene of Ficarazzi and Monte Pellegrino, in Tuscany by 

 de Stefani, and in Calabria by Tiberi. 



Cingula semistriata (Montagu). Plate LI, fig. 46. 



1808. Turbo semistriatus, Montagu, Test. Brit., Suppl., j). 136. 



1844. Rissoa subsulcaia, Philippi, Enum. Moll. Sic, vol. ii, p. 129, pi. xxiii, fig. 16. 



1853. Rissoa semistriata, Forbes and Hauley, Brit. Moll., vol. iii, p. 117, pi. Ixxx, figs. 4, 7. 



1859. Rissoa semistriata, G. B. Sowerby, 111. Ind. Brit. Shells, pl. xiii, fig. 25. 



1867 — 84. Rissoa semistriata, Jeffreys, Brit. Conch., vol. iv, p. 46, 1867 ; vol. v, p. 208, pl. Ixviii, 



fig. 8, 1869 ; in Lamplugh, Quart. Journ. Geol. Soc, vol. xl, p. 319, 1884. 

 1874. Rissoa (Cingula) semistriata, Seguenza, Boll. R. Com. Geol. Ital., vol. v, p. 6, uo. 204. 

 1878. Rissoa semistriata. Reeve, Conch. Icon., vol. xx, pl. iii, fig. 28. 

 1878. Cingula semistriata, G. O. Sars, Moll. Reg. Arct. Norv., p. 359. 

 1878 — 84. Rissoa {Cingula) semistriata, WontiiYo^-Ato, Enum. e Sinon. Conch, medit. (Giorn. Soc Sci. 



Nat. Palermo), vol. xiii, p. 85, 1878 ; Nom. Gen. e Spec. Conch. Medit., p. 06, 1884. 

 1884. Rissoa (Cingula) semistriata, Bucquoy, Dautzenberg et Dollfus, .AJoll. mar. Rouss., vol. i, 



p. 306, pl. xxxvii, figs. 1, 2. 

 1886—92. Cingula semistriata, Locard, Exped. Scient. Travailleur et Talisman (Mollusques), vol. i, 



p. 463, 1886; Coq. mar. Cotes de France, p. 175, 1892. 

 1892 — 98. Rissoa semistriata, A. Bell, Proc Yorks. Phil. Soc, p. 63, 1892 ; Proc. Roy. Irish Acad. 



[3], vol. ii, p. 629, 1893; Trans. Roy. Geol. Soc. Cornwall, vol. xii, p. 152, 1898. 

 1901. Cingula semistriata, Conch. Soc. List, Journ. of Conch., vol. x, p. 18, uo. 353. 

 1913. Rissoa (Cingula) semistriata, Dautzenberg et Durouchoux, Feuille des Jeunes Natur., vol. xliv, 



p. 31, pl. ii, fig. 14. 



