•268 THE FOEAMINIFEEA 



described the fauna in detail. Wright has dealt 

 with the Irish foraminiferal chalk, and the material 

 on which his work has been based is the flint meal 

 found in the pot stones or paramoudras of Ireland, 

 the chalk itself being usually so hardened by the 

 proximity of the basalt flows that it is impossible to 

 deal with it like our ordinary soft writing chalk. 



In Australia the borings into the cretaceous of 

 the central territories have given Howchin oppor- 

 tunity to record a fairly rich fauna, comprising the 

 genera Higmo'ilina, Hijpercnumina^ BeojjJiax, Hajjlo- 

 2)hragmi/n]i, Placopsiliiia, TJtnirnniuiiia, Aimnodiscus^ 

 Bigeneriiia, Verneitilina, Gcmdryina, Lage)ia, Nodo- 

 saria, Lingulina, Frondicularia, Vaginulina, Mar- 

 ginidina, Cristellaria, PoJijniorpMna, Spinllina, 

 Patelh'na, Discorhina, Anomalhia, Tr-iincatiLlma, and 

 Piilvimdina. 



The Chalk of Maestricht is rich in Foraminifera, 

 and the facies there met with is peculiar, for there 

 is a large preponderance of genera which are 

 characteristic of Eocene and Miocene strata else- 

 where, as, for example, Orbitolites, Calcarina, 

 Amj^histegina, Operculina^ and Orhitoides (sub-genus 

 L epidocgclina). 



In the London Basin Foraminifera occur in 

 nearly all the members of the Lower Eocene. The 

 Thanet sands in their more argillaceous strata in 

 Kent have afforded many species, which have 

 been described by Burrows and Holland. The 

 Foraminifera show a marked difference in the facies 

 from that of the highest mesozoic strata, but 



