FAMILY 4. MYARIA. 55 



PANDORA, Bruguiere. 



Testa inaequivalvis, ingequilateralis, latere postico rotundato, antico trans- 

 versim oblongo, hiantulo ; valva altera plana, margine antico de- 

 rlexo, dente unico oblongo, divaricato, obtuso ; altera concava, 

 edentula. Ligamentum internum, cicatriculae elongata? in utraque 

 valva affixum. 



The genus Pandora, though not very numerous in species, compre- 

 hends a distinct and characteristic series, and may be easily recognised 

 by a certain peculiarity of form in the oblong, Hexuous curve of the an- 

 terior side of the shell, as also by a small dividing tooth which appears 

 in one valve only. It may be described as inequivalve, inequilateral, 

 somewhat pearly, with the posterior side rounded, the anterior trans- 

 versely oblong and slightly gaping ; one valve is flat, turned downwards 

 at the anterior margin, and has a single, oblong, obtuse tooth; the other 

 is concave and destitute of teeth. 



The ligament is internal, fixed to an elongated cicatrix in each valve. 



Examples. 



PI. XXXVII. Fig. 1 to 3. 



Pandora rostrata, Lamarck, Anim. sans vert., new edit., vol. vi. p. 145. 



Sowerby, Species Conchy riorum, pi. 2. f. 7 to 9. 

 Tellina incequivalvis, Linnaeus. 



PI. XXXVII. Fig. 4 and 5. 

 Pandora flexuosa, Sowerby, Species Conchyliorum, pi. 3. f. 13 to 15. 



