ZOOLOGICAL AND BOTANICAL ASSOCIATION. 215 



Anomia ephippium (Linneus). 

 This species appeared abundantly, and presented some of its more 

 common varieties, Squamula especially, which obtained a size that 

 almost threw a doubt upon the hypothesis that it was merely the young 

 allowed to develop itself freely upon a smooth surface. The nacre of 

 the interior had generally preserved its original brilliancy. The bay 

 still contains living examples in numbers. 



Anomia aculeata {Mailer), 

 An individual of this species occurred in the raised beach at the 

 Kinnegar, Holywood. It is also found in the living state in the bay. 



Patella vulgata (Linneus). 

 One specimen only of the common limpet was found. Its paucity 

 is easily accounted for by the entire absence of rocks or stones. In 

 uitable localities in the neighbourhood, nothing could exceed the abun- 

 dance of this mollusc, which is a very favourite article of food amongst 

 the poor. 



Trochus cinerariu8 (Linneus), 



Was distributed in some numbers throughout the sandy clay of the 

 deposits, and the bay is still favoured with its presence in abundance. 



Trochus magus (Linneus). 

 This species, which Messrs. Forbes and Hanley note as "not having 

 been found fossil in our tertiaries," occurred sparingly in the post- 

 Pleistocene beds of Belfast. One specimen, whose base was one inch and 

 three-eighths in diameter, had attained the vertical height of seven- 

 eighths of an inch. It is an abundant species in the bay at present. 



Littorina littorea (Linneus). 

 Was diffused in vast quantities throughout the beds. It still exists 

 in innumerable numbers on the surface of such beds as are covered by 

 the sea even only during the period of high water. 



Littorina rudis (Donovan). 



Occurred but seldom. All along both sides of the harbour it at 



present li\ t s in abundance. 



200L. & BOT. SOC PROC VOL. I. 2 8 



