ACCOUNT OF 



Helix. 

 16. Nana« 



17. Margarita *. M. 



Dunbar, scarce. This has 

 been generally supposed 

 to be the fry of Helix 

 cornea. I have doubts 

 on the subject, which 

 will be explained hereaf- 

 ter. 



A new species from Dunbar, 

 not uncommon. 



NERITA. 



Animal a Limax. Shell univalve, spiral, gib- 

 bous, flattish at bottom. Aperture semi-orbi- 

 cular or semilunar. Pillar-lip transversely 

 truncate, flattish. 



1. littoralis. 



2. pallidula. 



3. glaucina. 



4. rufa. 



P. D. M. Common on all the coast. 

 D. M. Not uncommon at Dunbar. 



P. D. M. Portobello Sands sparingly, 

 in Aberlady Bay more 

 common, and at Dunbar 

 the fry plentiful, though 

 the mature shell never a- 

 bove once occurred there. 

 M. Dunbar, rare. This is sup- 

 posed to be the true Coch. 

 lea parva of Da Costa* 



* Tab. vill. fig. .5. 



1 



