620 PLIOCENE MOLLUSCA. 



however, from the Pleistocene of Selsey and Loch Larne, and from the Holocene 

 of Portrush. 



It resembles Manzonia zetlandlca in sculptnre, bnt has been separated from 

 that and other similar species by the Marchese di Monterosato on account of its 

 canaliculate base and the prominent tuberculation of its inner lip. He regarded 

 it as a distinct sub-genus {Acivo2-)s{s), in which he has been followed by the 

 authors of the Mollusca of Roussillon. By the Conchological Society of Great 

 Britain and some others it is grouped with Alvania. 



Sub-genus GALEODINA, Monterosato, 1884. 

 Alvania (Galeodina) carinata (Da Costa). Plate L, fig. 4-t. 



1779. Turho carinafus, Da Costa, Brit. Condi., p. 102, pi. xiii, fig. 10. 



1803. Turho striatnlus, Montagu (non Linm'), Test. Brit., vol. ii, p. 306, pi. x, fig. 5. 



1836-44. Rissoa lahkita, Philij)pi, Eniim. Moll. Sic, vol. i, p. 155, pi. x, fig. 7, 1836 ; vol. ii, p. 127, 



1844. 

 1853. Rissoa siriatula, Forbes and Hanley, Brit. Moll., vol. iii, p. 73, pi. Ixxix, figs. 7, 8. 

 1859. Bissoa striatula, G. B. Sowerby, III. Ind. Brit. Shells, pi. xiii, fig. 5. 

 1867—69. Bissoa striatula, Jeffreys, Brit. Concb., vol. iv, p. 5, 1867; vol. v, p. 206, ])1. Ixvi, fig. 1, 



1869. 

 1876. Rissoa carinata, Seguenza, Boll. R. Com. Geol. Ital., vol. vii, p. 102, no. 670. 

 1878. Rissoa striatula. Reeve, Conch. Icon., vol. xx, pi. ii, fig. 16. 

 1878 — 84. Rissoa {Alvania) carinata, Monterosato, Enuni. e Sinon. Conch. Medit. (Giorn. Soc. Sci. 



Nat. Palermo, vol. xiii, p. 84), 1878; (jaleodina striatula, Nom. Gen. e Spec. Couch. Medit., p. 65, 



1884. 

 1884. Rissoa (Galeodina) carinata, Bucquoy, Dautzenberg et Dollfus, Moll, mar, Kcmss,, vol. i, p, 302, 



pi. XXXV, figs. 1, 2. 

 1890, Rissoa (Galeodina) striatula, Carus, Prod. Faun. Medit., vol. ii, p. 335. 

 1892. Alvania carinata, LocarJ, Coq. mar. Cotes de France, p. 163, fig. 188. 

 1892, Rissoa striatula, A. Bell, Rep. Yorks. Phil. Soc, p, 63. 

 1901. Galeodiim carinata, Couch. Soc. List, Journ. of Couch,, vol. x, p. 18, no. 355. 



Specific Characters. — Shell oval, turreted and solid; whorls 5 — 6, convex, 

 angulated, the last much the largest, more than two-thirds the total length ; orna- 

 mented by numerous exceedingly fine and gently curved longitudinal ribs, Avhich 

 hardly reach the base of the shell, and by prominent spiral ridges, stronger than 

 the former, which produce delicate reticulation on the upper whorls, where they 

 intersect them. The transverse ridges are unequal in size, those below the suture 

 being the strongest and those on the base much finer; spire rapidly diminishing 

 upwards to a sharp apex ; suture well marked, but not channelled ; mouth large, 

 ovate, angulated above, roimded below ; outer lip semicirculai', thickened or 

 varicose ; inner lip broad, reflected on the pillar. 



Dimensions. — L. 4 mm. B. 3 mm. 



