PLATE CXXV. 



MACTRA GLAUCA. 



GLAUCOUS MAC-XRA^ 

 GENERIC CHARACTER. 



Animal a Tethys, Bivalve, sides unequal. Middle tooth compli- 

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



SPECIFIC CHARACTER 



AND 



» SYNONYMS, 



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

 finely ftriated transverselv, and wrinkled on the anterior end. 

 Mactra Glauca: testa ovata sordide alba glauco radlata sub- 

 tilissime transversim striata anterlus rugosa. Gmel." 

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

 Chcmn. Conch. 6. /. 23./. 232, 233. 



This is a new species as a Britisli shell ; and tbe conchologist is 

 indebted to Miss Pocock for tlie discovery of it on our coaft. The 

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

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

 several others, besides many rare kinds that have been found by 



VOL. IV. E 



