CO^CnXLlX—DlTHYRA. 46. 207 



^ auriculis subeeqvalibus. 1-7. 

 with the ears equal or nearly so. 



Pectbn testd inrBquivahi, valrd snperiori planatd in/'erne maximus. 



concavo-depressd, radiis rotundatis longitudinaliter striatis. 

 Shell inequivalve, the upper valve flat with a depression near 



the hinge, the rays rounded and striate longitudinally. 

 Ostrea maxima. Linn. Syst. Nat. p. 1144. 



Gmelin, Syst. p. 3315. 



Turtoiif Linn. Syst. iv p. 258. 



Donovan, British Shells, ii. tab. 49. 



Liinn. Trans, viii. p. 96. 



Dorset Catal. p. 37, tab. 9, fig. 3. 



Dillwyn, Descript. Catal. p. 247. 



Turton, Conch. Diet. p. 128. 

 Pecten maximus. Pennant, iv. p. 219, tab. 62. 



Chemnitz, vii. p. 268, tab. 60, fig. 585. 



Montagu, Test. Brit. p. 143. 



Turton, British Fauna, p. 161. 

 Pecten vulgaris. Da Costa, p. 140, tab. 9, fig. 3. 

 Pecten magnus. Lister, Conch, tab. 163, fig. 1. 

 Mus. nost. At the estuaries of large rivers. 



Shell four or five inches in diameter, white brown or marbled 

 with pink and dark chocolate brown, with 14 or 15 rounded ribs ; 

 inside white, with a broad deep purple margin. 



Pecten testd iniequivalvi, valvd snperiori planatd in/erne Jacoiwens, 

 concavo-depressd, radiis angulatis valvte inferioris longitu- 

 dinaliter sulcatis. 



