ZOOLOGICAL AND BOTANICAL ASSOCIATION. 219 



Tornatella fasciata. 



Several shells of this beautiful species were found by Miss Rea. 

 One individual measures an inch in length. It occurs in the dead state 

 in the bay. 



Akera bullata (Mailer). 

 Was represented by a specimen or two only, perhaps on account of 

 its extreme tenuity. It is sometimes thrown upon the shores of the bay 

 in vast numbers. 



Scaphander lignarius (Linneus). 

 A portion of a full-grown shell'of this species, the well-known Bulla 

 lignaria, was found in the clay. It is still an occupant of the harbour. 



Philine aperta (Linneue). 



The shells of this species, the Bullcea aperta of Lamarck, were abun- 

 dantly present in the deposits. The largest individual met with mea- 

 sured three-fourths of an inch in length, and five-eighths in breadth. 

 We still have it in our harbour. 



Helix nitidulu8. 



Two specimens of this species were met with by Miss Rea, doubtless 

 brought down by the river from its banks, where it may now be found 

 in the living state under stones, and also in suitable localities in the 

 neighbourhood. 



Helix rotundata (Mailer). 

 This species, the radiata of Da Costa, was found once. It is at 

 present in its usual abundance in the immediate neighbourhood of the 

 town. 



Helix nemoralis (Linnem). 

 Also occurred once. It was of the single-banded variety. The 

 species is common near the town. 



Limneus pereger. 

 A few individuals were found embedded on the marl of the Three- 

 milewater in such a manner that they could not be suspected of having 



