PLATE LXXXIX. 



Mya minor ex flavo viridescens. Pictorum Da Costa. Br. Conch, 

 p. 228. tab. 14-./^. 4. 4. 



Pennant and Da Costa have erroneously given this as the Mi/a 

 pictorum of Linnaeus, from which it differs in several respects. The 

 Mya pictorum is much more ovate, or egg-shaped, as Linnaeus ex- 

 presses it, and thinner than the present shell, which is of a lengthened, 

 or rather oblong form, and remarkably thick, though semi-transparent. 

 In adopting a new specific name that of oblonga would have been 

 preferred, had it not been pre-engaged by Gmelin to a totally distinct 

 species. 



This species is common in rivers and fresh waters, and sometlmse 

 produce little pearls. 



