POST-TERTIARY FOSSILIFEROUS DEPOSITS. 73 



The Ostracoda yield a kindred result. 



In the fossiliferous clays of Errol such species as Cythere mirahilis, Ci/theridea 

 Sorbyana, and Cytheropteron Montrosiense, occur with an abundance sufficient to be 

 characteristic, while they are exceedingly rare in the western beds. 



The existence of an Arctic current on the east, such as that which now sweeps over 

 the Dogger Bank, might sufficiently account for the preponderance in question without 

 having recourse to any larger hypothesis. 



Height above the sea forty-five feet. 



The following Ostracoda have been found : 



Cythere viridis, Miiller. 



— lutea, Miiller. 



— convexa, Baird. 



— villosa (G. O. Sars). 



— concinna, Jones. 



— glohulifera, Brady. 



— emarginata (G. 0. Sars). 



— tuberculata (G. O. Sars). 



— mirahilis, Brady. 



— Dunelmensis (Norman). 

 Cytheridea papulosa, Bosquet. 



— punctillata, Brady. 



— Sorbyana, Jones. 

 Krithe glacialis, n. sp. 

 Cytlierura concentrica, n. sp. 



— gibba (Miiller). 

 Cytheropteron latissimum (Norman). 



— nodosum, Brady. 



— arcuafum, n. sp. 



— injlatum, n. sp. 



— Montrosiense, n. sp. 

 Sclerochilus contortus (Norman). 



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