PLATE CXXV. 



MACTRA GLAUCA. 



GLAUCOUS MACTRA. 



GENERIC CHARACTER, 



t 



Animal a Tethys, Bivalve, sides unequal. Middle tooth compile 

 cated, with a little groove on each side ; lateral teeth remote. 



SPECIFIC CHARACTER 



AND 



SYNONYMS. 



Shell ovate, sordid white with brown (or glaucous) rays : very 

 finely lariated transversely, and wrinkled on the anterior end. 

 Mactra Glauca : testa ovata sordide alba glauco radiara sub- 



tilissime transversim striata anterius rugosa. Gmel. 



T. I. p. 6. p. 3260. fp. 20. 

 Chemn. Conch. 6. t. 23./. 232, 233. 



This is a new species as a British shell ; and the conchologist is 

 indebted to Miss Pocock for the discovery of it on our coair. The 

 attention with which this lady has honoured the science has not been 

 rewarded by this new species only : we have been favoured ■ 

 several others, besides many rare kinds that have 



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