BIVALVIA. 219 



The habits of the living species are generally littoral ; and they bury themselves 

 in the sand, leaving their siphons on a level with the surface. 



1. DONAX VITTATUS, Da Costa. Tab. XXII, fig. 7, a, b. 



DONAX TRUNCULUS. Linn. Syst. Nat., ed. 12, p. 1127, fide Forb. and Hani. 

 Penn. Brit. Zool., ed. 4, vol. iv, p. 93, pi. 55, fig. 45. 

 Lovtn. Ind. Moll. Scand., p. 42, 1846. 



VTTTATUS. Gray. List Brit. MolL, p. 46, 1851. 



ANATINUS. Forb. and Hani. Hist. Brit. Moll., vol. i, p. 332, pi. 21, figs. 4 6, 



and pi. K, fig. 7, 1848. 



RUBER. Turt. Brit. Biv., p. 127, pi. 10, fig. 14, 1822. 



CUNEUS VITTATUS. Da Costa. Brit. Conch., p, 207, t. 14, fig. 3, 1778. 



Spec. Char. Testa transversd, oUongd vel cuneiformi, incequilaterali ; postice breviore, 

 Iruncatd, antice rotundatd; tenuissime striatd, obsolete decussatd ; margine ventrali 

 convexiusculo, crenulato. 



Shell transversely oblong or wedge-shaped, inequilateral; posterior side the 

 shorter, truncated, and obtusely pointed ; anterior rounded ; striated externally and 

 somewhat obscurely decussated ; ventral margin slightly convex and crenulated. 



Length, 1 \ inch. Height, f ths of an inch. 



Locality. Mam. Crag, Bramerton. Recent, British Seas. 



This common living species I have seen only from the above locality, where I am 

 informed it is by no means rare. 



2. DONAX TRUNCULUS, Linnaus. Tab. XXII, fig. 8, a, b. 



DONAX TRUNCULUS. Linn. Syst. Nat., ed. 12, p. 1127, 1767. 



Born. Test. Mus. Cses., p. 54, t. 4, figs. 3, 4, 1780. 



Poli. Test. Sicil., vol. ii, p. 76, t. 19, figs. 1220, 1795. 



Savigny. Descr. de 1'Egypt, torn, xxii, p. 198, pi. 8, fig. 14. 



Phil. En. Moll. Sic., vol. i, p. 36 ; vol. ii, p. 28. 



Broc. Conch. FOBS. Subappen., p. 535, 1814. 



Desk. Exped. Scient. Alger. Moll., pi. 74, figs. 1 5 ; and pi. 75. 

 TRUNCATA. S. Wood. Catalogue, 1840. 

 CAPSA TRUNCULUS. Hanley. Recent Shells, p. 87, pi. 11, fig. 38. 

 SERRULA L^EVIGATA. Chemn. Conch. Cab., vol. vi, p. 259, pi. 26, figs. 253, 254, 1782. 

 LE GAFET? Adans. Nat. Hist. Senegal, t. 18, fig. 2. 



Spec. Char. Testa transversd, cuneatd, Icevigatd, valde inaquilaterali ; latere postico 

 brevissimo, truncato ; margine ventrali crenulato. 



