FOSSIL FORAMINIFERA FROM THE BURDWOOD BANK 



Biloculina ringens (Lamarck) 

 B. elongata, d'Orbigny 

 Miliolina grata (Terquem) 

 CassiduUna crassa, d'Orbigny 

 Lagena globosa (Montagu) 

 Cristellaria gibba, d'Orbigny 



Polymorph ina gutta, d'Orbigny 

 Truncatulina refulgens (Montfort) 

 T. lobatula (Walker) 

 T. ungeriana (d'Orbigny) 

 Rotalia beccarii (Linne) 



AGE OF THE BURDWOOD BANK FAUNA 



Of the fossil Foraminifera under discussion many have no value by themselves as age 

 markers, since they range from the Cretaceous to the present day. Four species, how- 

 ever, Rzehakina epigona, Spiroplectammma spectabilis, Pseudotextidaria globulosa and 



E, T. Talbot del. 



m 



Fig. I. 



a, b. Rzehakina epigona (Rzehak), / 37; St. WS 87, loose. 



c, d. Spiroplectammina spectabilis (Grzybowski), form ?B, x 37; St. WS 87, shale. The early part of the 

 test is difficult to see clearly, and the initial chamber may have been over-emphasized in the figure. 

 Alternatively the specimen may be the Aj form. 

 e. Nodosaria lijnbata, d'Orbigny, x 37; St. WS 87, loose. 

 f,g,h. Gyroidina nitida (Reuss), x 37; St. WS 87, shale. 



ij. Spiroplectammina spectabilis (Grzybowski), form A, x 37; St. WS 87, shale. 

 k, I. Pseudotextidaria globulosa (Ehrenberg), x 37; St. 87, loose. 

 ?n, n. Cyclammina elegans, Cushman, form B, x 18; St. 719, loose. 

 The age of these specimens is probably Upper Cretaceous (Senonian). 



