49 



TABLE OF THE BRITISH TERTIARY (AND SOME POST-TERTIARY) 

 OSTRACODA, SHOWING THEIR GEOLOGICAL RANGE. 



Bairdia subdeltoidea 



Cythere Harrisiana 



Cytheridea perforata 



Cy theropteron triangulare 



Candona Richardsoni 



? Cy there amissa 



Cytheridea Muelleri 



— — var. torosa 



sp. 



Bairdia subtrigona 



— Londinensis 



— ovoidea 



Cythere arenosa 



— scabropapulosa 



— — var. aculeata 



— plicata 



— scrobiculoplicata 



— — var. recta 



— transenna 



Cy thereis Prestwichiana 



— aranea 



— Bowerbankiana 



— horrescens 



— spiniferrima 



Cytheridea perforata, var. insignis 



— glabra 



Krithe glacialis 



— Londinensis 



Cytherella compressa and var 



— ■ fabacea 



— Beyrichi 



Bythocypris subreniformis 



Bairdia, sp 



Cythere striatopunctata 



— venustula 



— costellata 



— var. triangulata 



— gyri plicata 



Cythereis cornuta 



Cytheridea debilis 



Cytherura Prestwichiana 



g. a. 

 ■Si 



bo a 



pu a 



16 

 24 



29 

 44 

 13 

 21 

 37 

 37 

 40 

 17 

 17 

 18 

 27 

 28 

 28 

 29 

 30 

 30 

 31 

 33 

 33 

 34 

 34 

 34 

 39 

 39 

 41 

 41 

 47 

 47 

 48 

 16 

 17 

 19 

 20 

 30 

 30 

 30 

 36 

 38 

 43 



OP* 



.2 b£ 



fc.2 



' O 



« 



PQ 



1 Cythereis sp., a fragment, lias been found in the Tuanet Sands of Pegwcll liay ; p. 36. 



