POST-TERTIARY FOSSILIFEROUS DEPOSITS. 



55 



clay we obtained an oval plate of an EcJdmis, three valves of Cytherura Sarsii, twelve 

 specimens of Nonionina depressula, and three of Polystomella striaio-punctata. 



A much larger portion from the same stratum had previously been examined without 

 finding a vestige of animal remains, showing how unsafe it is to pronounce any deposit 

 unfossiliferous from one trial, inasmuch as organisms may not be equally distributed 

 through all parts of the same stratum. 



The shell-bearing clay consists of 32 per cent, fine mud ; 68 per cent, fine sand. 



The laminated clay when dry is of a Hghtish drab colour, and consists of 90^ per cent, 

 fine mud, \ per cent, fine sand, with occasionally small pebbles less than the size of a 

 common pea. 



The Boulder Clay, which is very unevenly distributed, and at some places rises up in 

 knolls through the grey clay and nearly reaches the muddy sand layer above, when dry 

 consists of 51 per cent, fine mud, 28 per cent, fine and coarse sand, 21 per cent, 

 gravel. 



Height above the sea fifteen to twenty feet. 



The following Ostracoda were found : 



ArgilloEcia cyUndrica, G. 0. Sars. 

 CytUere castanea, G. 0. Sars. 



— porcellanea, Brady. 



— Macallana, Brady and Robertson. 



— viridis, Midler. 



— lufea, Miilier. 

 ■ — Cluiha, n. sp. 



— Umicola (Norman). 



— pulchdla, Brady. 



— villosa (G. O. Sars). 



— concinna, Jones. 



— angulata (G. 0. Sars). 



— tuhermlata (G. O. Sars). 



— Bunelmensis (Norman). 

 Cytheridea pajnUosa, Bosquet. 



— pundillata, Brady. 

 Uucythere Argus, G. 0. Sars. 

 Loxoconcha tamarindus (Jones). 

 Cytherura nigrescens (Baird). 



— gibba (Miilier). 



