COfiCHYUX—BITHYRA. 12. 



The specific name, infBquivalvis, originally given to this and 

 the Tellina inaequivalvis, is now quite inapplicable in consequence 

 of its forming an essential part of the generic character. We 

 have therefore, after Lamarck, been induced to exchange them 

 for names more appropriate. 



12. PANDORA— i4M412Cii. 



Testa transversa, ineeqmvalvis, intsquilateralis, latere antico 

 hiante. Cardo valvte planatie dente unico cum foveold 

 longitudinali ; valvie convexee fnveolis duabus longitudinaU- 

 but : lateralibus nullis. liigamentum internum. 



Shell transverse, inequivalve, inequilateral, open at the anterior 

 end. Hinge of the flat valve with a single tooth and longitu- 

 dinal cavity, of the convex valve with two longitudinal cavities : 

 lateral teeth none. Ligament internal. 



margaritacea. Pandora. 



Ta6.nos#. 3, fig. 11 to 14. 

 Tellina inaequivalvis. Linn. Syst. Nat. p. 1118. 

 Gmelin, Syst, p. 3233. 

 Turton, Linn. Syst. iv. p. 189. 

 Chemnitz, vi. p. 114. tab. 11, fig. 106. 

 Montagu, Test. Brit. p. 75, Suppl. 27. 



