47 



Qastrochtena modiolina, Thorpe, Brit. Mar. Couch, p. 33, 1844. 

 Jay, Catalogue, 4th ed. p. 9, 1850. 

 Leach, Moll. Great Britain, p. 256, t. 3, f. 3, 1852. 

 Forbes and Hanley, Brit. Moll. i. p. 132, t. 2, f. 



5—8, and t. F, f. 5, (animal,) 1853. 

 Woodward, Manual, pt. 2, t, 23, f. 15, 1854. 

 Gray, Proo. Zool. Soc. Lond. p. 310, 1858. 

 GastrocLuena dubia, Philippi, Wiedemann's Archiv. Natur. t. 7, f. 1, 1845. 

 Catlow, Conch. Noinenc. p. 2, 1845. 

 Deshayes. Expl. Soi. de l'Algerie, Moll. p. 34. 



" Traite Flora, i. pt. 2, p. 34, t. 2, f. 4, 5, 



1843— '50. 

 Rocellaria dubia, H. and A. Adams, Genera, iii. t. xci. f. 2, a, b, c, 1855. 

 Description. — " R. vagina pyrilbrmi, contorta, crassii intus, ad aperturam 

 bicarinata ; testa ovato-oblonga, angusta, trans versiui striata, antioo sinuatii ; 

 natibus prominulis, latere antico brevissimo." — Deshayes. 

 Hab. — England, Mediterranean. 



This species may be readily distinguished from the others by the slight 

 truncation of the margin at the posterior end of the shell, by its short, wide 

 hiatus, and its large laminar hinge plate. 



There are many excellent figures in the list of works quoted above, and a 

 very full description is contained in the " British Mollusca " of Messrs. Forbes 

 and Hanley. 



4. R. hi a lis,* Chemnitz, sp. 



Pholas hians, Chemnitz, x. p. 364, t. 172, f. 1678 and 1679. 1788. 

 Gmelin, Syst. Nat. 3217, 1790. 

 Schreibers, Versuch naoh Conch, ii. p. 367, 1793. 

 Dillwyn, Desc. Cat. i. p. 39, 1817. 

 Wood, Gen. Conch, p. 85, 1815. 

 " Index Test, 1st ed. p. 9, 1818. 

 " " " 2d ed. t. 2, f. 11, 1828. 



Fistulana rupestris, Bosc, Hist. Nat. des Coq. ii. p. 205, 1824. 

 Chrena cuneiformis, Retzius, Nov. Test. Gen. p. 19, 1788. 

 Gastrochama cuneiformis, Spengler, Nov. Act. Sc. Soc. ii. p. 179, f. 8 — 

 11, 1783. 

 Lamarck, Anim. Sans Vert. v. p. 447, 1818. 

 " (Desh edit.) Anim. Sans Vert. vi. 



p. 49, 1835. 

 Rang, Tabl. Meth. 



Sowerby, Genera, f. 3, 4, 5, 1820— '24. 

 Blainville, Man. de Malacol. p. 574, t. 79, f. 



5, 1S25. 

 Anton, Verzeich der Conchyl. p. 1, 1839. 

 Hanley, Desc. Cat. p. 10, 1842. 

 Reeve, Conch. Syst. t. 20,f. 4, 5, 1843. 

 Potiez et Michaud, Gallerie des Moll. ii. p. 



267, 1844. 

 Catlow, Conch. Nomenc. p. 2, 1845. 

 Jay, Catalogue, 4th ed. p. 8, 1850. 

 D'Orbigny, Sagra's Hist, de l'lsle de Cuba, 



Moll. p. 228, 1853. 

 Beau, Cat. des Coq. Guadaloupe, p. 27, 1858. 

 Gastrocbsena hians, Gray, Zool. Proc. Lond. p. 316, 1858. 

 Rocellaria hians, H. and A. Adams, Genera, ii. p. 336, 1856. 

 Description. — " R. testa, ovata, cuneiformi, tenui, albida, subpellucida, con- 

 centrice dense striata, latere anali elongato, rotundato ; latere anali brevi, 

 •angustato, acuminato ; latere palleali hiante." — D'Orbigny. 

 Hub. — West Indies. 



