POST-TERTIARY FOSSILIFEROUS DEPOSITS. 65 



19. DUNTROON. 



This deposit occurs a little to the south of Duntroon Castle and comes to the surface 

 at about high-watpr-mark. By clearing away a slight covering of gravelly sand a stiff 

 brovi^n clay is reached, containing many of the typical Arctic species of this series of 

 beds in abundance. 



Pleurotoma pyramidalis is particularly plentiful. 



The clay vi^hen dry imbibes the water very slowly, pieces from three to four inches 

 in diameter taking nearly twenty-four hours to dissolve ; nevertheless, it passes easily 

 through the sieve and washes rapidly, losing 83 per cent, in the operation. 



Height above the sea, just above high-water-raark. 



The following Ostracoda were found 



Argillmcia cylindrical G. 0. Sars. 

 Pontocypris trigonella, G. 0. Sars. 

 Cythere castanea, G. O. Sars. 



— viridis, Miiller. 



— lutea, Miiller. 



— liinicola (Norman). 



— pulchella, Brady. 



— villosa (G. O. Sars). 



— concinna, Jones. 



— angulata (G. O. Sars). 



— tuherculata (G. O. Sars). 



— Dunehnensis (Norman). 

 Cytheridea papillosa, Bosquet. 



— punctillata, Brady. 

 Eucythere Argus (G. 0. Sars). 

 Krithe Bartonensis (Jones). 

 Loxoconcha impressa (Baird). 



— tamarindus (Jones). 

 Cytherura nigrescens (Baird). 



— similis, G. 0. Sars. 



— pmnila, n. sp. 



