SoLEN. MOLLUSCA. SOLENID^. 459 



oblique, shortest dorsally ; teeth flattened on the rubbing surface ; the oppo- 

 site sides strengthened by a rib ; syphons connected ; pale yellow, longitudi- 

 nally striated, and annulated with brown, the openings fimbriated. 



562. S. novacula. — A single strong, curved, blunt tooth in 

 eacli valve ; shell destitute of the terminal strictui'e. 



Mont. Test. Brit. 47. Turt. Biv. Brit. 80 — English and Irish coasts. 

 Length 1 inch, breadth 8 ; nearly resembling the following, but differing 

 in the number of teeth and the absence of the lateral teeth. 



563. S. Siliqua. — Shell straight, two teeth in one valve, one 

 in the other ; with a tooth-like laminar marginal process behind 

 each. 



Concha fusca, List. An. Ang. 192. t v. f. 37. Conch, t. ccccix. — S. sil. 

 Linn. Syst. i. 1113. Penn. Brit. Zool. iv. 83. t. xlv. f. 20. MonL 

 Test. Brit. 46. Turt. Biv. Brit. 80 — On sandy shores, common — 

 JE, Rasor fish ; S, Spout fish. 

 Length upwards of an inch ; breadth from seven to eight ; cuticle olive- 

 brown, darkest at the anteal extremity ; the lateral teeth are remote, rising 

 behind into an angular plate. — The animal is used as food, and considered as 

 a delicacy ; when a little stale, it forms a tempting bait for the cod and 

 haddock. Dr Turton describes a shell under the title S. Ugula (Biv. Brit. 82. 

 t. vi. f. 6.) differing only from this species in the single tooth being " compres- 

 sed, rounded, and obtuse at the top, where it is slightly cloven." 



5G^. S. Ensis. — Shell a httle recurved, two teeth in one 

 valve, and one in the other ; one of the lateral teeth grooved. 



S. curvus, ZJs<. Conch, t. ccccxi — S. ensis, Lmn. Syst. i. 1114. Penn. 

 Brit. Zool. iv. 83. Mmt. Test. Brit. 48. Turt. Biv. Brit. 82 San- 

 dy shores, common. 

 Length fths of an inch, breadth 6 inches, but usually much smaller ; cur- 

 vature of the shell regular; the lateral marginal teeth are low, with the left 

 one recurving the opposite into a linear groove. 



565. S. 'pnrpureus. — Obliquely truncate retrally, and irregu- 

 larly striated transversely. 



Mya purp. Mont. Test. Brit. Sup. 21.— Agina purp. Turt. Biv. Brit. 54. 



t. iv. f. 9 In rocks, Torbay. 



Length one-eighth of an inch, breadth a quarter ; convex ; opake, with a 

 glossy cuticle, beaks prominent, nearly terminal ; hinge, with a strong conic 

 tooth in each valve, penetrating a cavity of the opposite valve. 



** Hinge not terminal, the anteal extremity rounded. 



566. S. pellucidus. — Dorsal margin nearly straight, ventral 

 margin slightly curved. 



Penn. Brit. Zool. iv. 84. t. xlvi. f. 22. Mont. Test. Brit. 49. Turt. Biv. 

 Brit. 83 — In sandy bays. 



Length a quarter, breadth upwards of an inch ; pellucid, fragile; rounded 

 at each end ; the hinge is removed but a short way from the extremity, and 

 consists of one tooth in one valve, and two teeth in the opposite with conti- 

 guous lateral processes. 



567. S. Legumen. — Dorsal and ventral margins slightly round- 

 ed; compressed, and narrow retrally. 



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