Class VI. ANOMIA. JNOMIJ. ' 233 



Adheres to oysters, crabs, and lobsters, and 

 shells. ''5i^^ > ^ 



Gm. Lin. 3346. Mont. Test. Br. 157. i- 4. 3. aculea- 



TA 



Lin. Tr. viii. 103. /. 5. 



* A. with a somewhat orbicular spiry shell ; 

 beak smooth, bending downwards ; diameter 

 three-eighths of an inch. 



Found in Devonshire, Cornwall, and Red- 

 wharfhcii^ Anglesey. 



Gm. Lin. 3346. 



Mont. Test. Br. 153. 



157- 



4. UNDU 



Lin. Tr. vili. 103. 



^.4./. 6. 





LATA. 



* A., shell with a crenated margin ; the evener 

 valve very thin and smooth, having a large oval 

 perforation ; the convex valve has longitudinal 

 waved strice, transversely decussated by others 

 which are curved. 



In the sea, attached to shells. 



Lin. Tr. vili. 104. t. 3. /. 6. Mont. Test. Br. Sup. 64. 5. CYMBI- 



FORMIS. 



* A. with an oblong shell, rough, somewhat 

 striated ; the beak incurvated ; flatter valve 

 perforated. 



Discovered by Mr. M''Leay on the coast of 

 Caithness-shire. 



