49 



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

 OSTRACODA, SHOWING THEIR GEOLOGICAL RANGE. 



Bairdia subdeltoidea 



Cy there Harrisiana 



Cytheridea perforata 



Cytheropterou triangulare 



Candona Eichardsoni 



? Cy there amissa 



Cytheridea Muelleri 



— — var. torosa .. 



— sp. 



Bairdia subtrigona 



— Londinensis 



— ovoidea 



Cy there arenosa 



— scabropapulosa 



— — var. aculeata 



— plicata 



— scrobiculoplicata 



— — var. recta 



— transenna 



Cy thereis Prestwichiana 



— aranea 



- — Bowerbankiana 



— ■ horrescens 



— spiniferrima 



Cytheridea perforata, var. insignis 



. — glabra 



Krithe glacialis 



liondinensis 



Cytherella corapressa and var 



— fabacea 



— Beyrichi 



Bythocypris subreniformis 



Bairdia, sp 



Cy there striatopunctata 



— venustula 



— costellata 



— — var. triangulata 



— gyriplicata 



Cythereis cornuta 



Cytheridea debilis 



Cytherura Prestwichiana 





;^ 



cL a 



!(!■ 



24 



20 



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 



iH O 





n 



« 



X 



X I 

 X ' X 

 X 



w 



I 



> Cythereis sp., a fragment, has been found in the Thanet Sakds o£ Pegwell B.iy ; p- 36. 



