157 



o. 



Anomia aculeata. Gmel. Syji. p. 3346. 30. Aculeata, 



C/iem. Co7ich. viii. t. 77. f. 702, Tab. 4. f. 5, 



Turt. Lin. iv. p. 2S5. 

 Gualt. t. 97. B. lower ficrure. 



A. with a thin, compreffed, muricated fliell, with inter- 

 rupted, longitudmal flrias, furniOied with frnall, concave, 

 obtufe fpines : beak fmall, turning a little downwards: 

 under valve flat, generally plain, but fometimes a little 

 echinated towards the margin ; perforated near the hinge. 

 Diameter three-eighths of an inch ; mod frequently not fo 

 large on our coaRs. 



We have found this fpecies in Devonjtiirc and Cornzcall, 

 adhering to the roots oi aigcE : mofl commonly of a dirty 

 white or brownifli colour. 



4. 

 Anomia undulata. Gmel Syft. p. 3346. 31. U.vdulata. 



Turt. Lin. iv. p. 2S6. Tab, 4. f. 6. 



Anomia undulatim ftriata. Chem. Conch, t. 7 7. f. 699. 



A. with an extremely delicate, thin, pellucid, flat fliell, 

 of a fub-orbicular fliape, with numerous undulated rib- 

 like ftriae, radiating from the ww^o .■ beak fmall, pointed, 

 placed a little within the margin ; lower valve almofl 

 membranaceous, plain ; perforation near the hinge, large^ 

 oval. Infide pearlaceous. Diameter about an inch. 



This fpecies, like others of the genus, is fubjeft to vary 

 in fliape, dependmg intirely on the body to which it is af- 

 fixed 



