222 CARDIUM. 



SMOOTH COCKLE. 

 PL 54. /. 1, 2. Mrs. M awe. 



20. CardiuiD laevigatum. C. testa obovata, striis obsoletis longitudina- 

 libus. Linn. Syst. Nat. ed. 12. p. 1123. Linn. Gmel. 3251. 



Shell obovate, with obsolete longitudinal striae. 



List. Anim. Angl. pL 5. f. 32. Conch, pi. 332. f. 169. Petiver 



Gaz. pi. 93. f. 10. Penn. Brit. Zool. 4. pi. 51. f. 40. Da Costa 

 Brit. Conch, pi. 13. f. 6. Pult. in Hutch. Dorset, pi. 7. f. 6. Donov. 

 Brit. Shells, pi. 54. Mont. Test. Brit. p. 80. Linn. Trans. 8. p. 65. 



/3. Chem. Conch. 6. pi. 18. f. 185, 186. 



A strong, smooth, yellowish-white shell, obsoletely 

 ribbed longitudinally, and covered, when recent, with 

 a dark green epidermis : the inside is white, with a cre- 

 nated margin ; length two inches and a quarter ; breadth 

 nearly an inch. Young shells are very smooth, and 

 sometimes variegated with rose colour. 



Inhabits the coasts of Great Britain. 



/3. Figure 2. pi. 54. is a variety of our C. laevigatum, 

 of a longer shape, ribbed in the same manner, and pret- 

 tily mottled with yellow. It inhabits the Indian seas, 

 and is figured by Chemnitz. It is distinguished by 

 Bruguiere, under the name of C. biradiatum. Our speci- 

 men is not rayed within-side. 



