POST-TERTIARY FOSSILIFEROUS DEPOSITS. 



71 



Mya truncata . . . . Fry, one valve. 



Mytilus edulis .... Fragments. 

 Balanus crenatus . . .One plate. 



Fry of Gasteropoda. 

 Claw of Crustacean. 



The following Ostracoda were found : 



Cypris compressa, Baird. 



— ovum (Jurine). 



— yibba, Ramdohr. 

 Pontocypris mytiloides (Norman). 



— trigonella, G. 0. Sars. 

 Cytliere castanea, G. O Sars. 



— tenera, Brady. 



— lutea, Miiller. 



— pulchella, Brady. 



— villosa (G. O. Sars). 



— concinna, Jones. 



— angidata (G. O. Sars). 



— tuherculata (G. 0. Sars). 

 Limnicythere inopinata (Baird). 



— antiqua, n. sp. 

 Cytheridea papiUosa, Bosquet. 



— punctillata, Brady. 



— lacustris (G. O. Sars). 

 Loxoconclia tamarmdus (Jones). 

 Cytherura niyrescens (Baird). 



26. Errol, Perthshire. 



On the north side of the River Tay, eight miles east from Perth, a clay is exposed 

 remarkable for the intensely Arctic character of its fossils. 



1. Its surface is covered by theestuarine mud of the Tay. 



2. The deposit of clay itself occupies a small oval trough about one mile in length \ 



