146 Proceedings of the Royal Physical Society. 



unlikely it may appear that the shells of Ostracocls can resist 

 decomposition, yet here we have proof that they have clone 

 so. A considerable number of the freshwater foraminifer, 

 Dejltigia, sp., also occurred along with the Ostracoda. 



^ MOLLUSCA. 



PisicUtim pusilhcm (.^),Gmelin. One immature specimen. 



OSTKACODA. 



Cypria ophthalmica (Jurine). This species was of 

 frequent occurrence, but few were well pre- 

 served, and some had the appearance of being 

 coated with a ferruginous dust. 

 „ Serena (Koch). One or two specimens. 



Cypris incongruens, Eamdohr. One specimen. 



Erpetocypris olivacea {?), Brady and Norman. One speci- 

 men. 



Candona rostrata, Brady and Norman. One specimen. 

 This is the first record of the occurrence of this 

 species as a post-tertiary fossil, but one of the 

 Authors has since found it in a somewhat 

 similar deposit in Eoss-shire, in moderate 

 abundance. 



Candona Candida (Miiller). One or two specimens. 



Limnicythere inopinata (Baird). One specimen. 



MOLLUSCA 



Found in the various Lacustrine Deposits. 



The foUowinc^ is a full list of the Molluscan remains 

 observed in the various lacustrine deposits referred to in the 

 preceding notes : — 



Sphmrium corneum (Linne). 

 Pisidiuni fontinale (Draparnaud). 



„ pusillmii (Gmelin). 



„ nitidum, Jenyns. 

 Valvata piscinalis (Miiller). 

 „ cristata^ Miiller. 



