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 TKUNCULtrs. Linn. Syst. Nat., ed. 12, p. 1127, fide Foi-b, and Hani. 



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



— — Loven. Ind. Moll. Scand., p. 42, 1846. 



— VITTATUS. Gray. List Brit. Moll,, p. 4 G, 1851. 



— ANATiNUS. Forb. and HanL Hist. Brit. Moll., vol. i, p. 332, pi. 21, figs. 4—6, 



and pi. K, fig. 7, 1848. 



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

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



iS/jec. Char. Testa transversa, oblongd vel cunei/ormi, ineequilaterali ; postice breviore, 

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

 convexiusculo, crenulafo. 



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. Don AX trunculus, Liniiceus. Tab. XXII, fig. 8, a, b. 



DoNAX TEUNCULUS. Limi. Syst. Nat., ed. 12, p. 1127, 1767. 



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



— — Poll. Test. Sicil., vol. ii, p. 76, t. 19, figs. 12—20, 1795. 



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



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



— — Broc. Conch. Foss. Subappen., p. 535, 1814. 



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



— TRUNCATA. S. TFood. Catalogue, 1840. 



Capsa TRUNCULUS. Hauley . Recent Shells, p. 87, pi. 11, fig. 38. 



Serrula l^vigata. 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 incequilaterali ; latere postico 

 brevissimo, truncate ; margine ventrali crenulato. 



