104 MY A. 



an olive green shell inclining to brown, with a pearly 

 inside, and a broad crenated tooth in each valve, be- 

 sides two lateral laminae, or plates, in one valve, and 

 one in the other, which lock together, and form the 

 hinge. Both ends of the shell are rounded, and in this 

 it principally differs from the following species. 



It is common in Holland, and used by the Dutch 

 painters to contain a preparation of gold and silver 

 leaf. In England it is considered as a rare shell ; no- 

 ticed by Mr. Montagu, in the river Kennet, above the 

 town of Newbury in Berkshire, but no where else. 



PAINTERS GAPER. 

 PL 19./. 3, 4. 



26. My a Pictorum. M. testa ovata, cardinis dente primario crenulato, 



laterali longitudinal i, alterius duplicato. Linn. Syst. Nat. ed. 12. 



p. 1112. Linn. Gmel. p. 3218. 

 Shell oval, hinge with a crenated primary tooth ; a long lateral tooth in 



one valve, and two in the other. 

 List. Anim. Aug. t. 2. f. 4. Append. 1. 1. f. 4. Conch. 



t. 146. f. 1. 147. f. 3. Petiv. Gaz. t. 93. f. 9. Schroter Flussconch. 



t. 3. f. 3. and t. 4. f. 6. Penn. Brit. Zool. 1812. v. 4. pi. 46. f. 7. 



Da Cost. Brit. Conch, p. 228. pi. 15. f. 4. Encyclop. Method, pi. 248. 



f. 4. Donov. Brit. Shells, pi. 89. Mont. Test. Brit. p. 34. ( Mya 



oralis.) Linn. Trans. 6. pi. 14. f. 7, 8, 9. and 8. p. 38. 



This shell is of an oblong-oval shape, and longer in 

 proportion than the M. Batava. It is covered with a 

 green epidermis, striated concentrically, which, in old 

 shells, is almost black. In young shells, the epidermis 

 is often wrinkled near the hinge, which part in old 

 shells is sometimes decorticated. The inside is pearly, 

 and the hinge is furnished with teeth of the same form 

 as in the M. Batava. The valves shut close in front, 

 but are a little open at each end. 



