on the Organic Composition of Chalk and Chalk Marl. 387 



the living state has been extended to fifty-seven, namely, of 

 calcareous-shelled Polythalamia nine species, and of siliceous- 

 shelled Infusoria forty-eight species. The following is a list 

 of these species and of the localities in which they occur, both 

 in the living and fossil state. In the fossil localities, W. C. 

 signifies white chalk, C. M. chalk marl, and C. C. compact 

 chalk. 



Calcareons-shelled Polythalamia . 



Living. 



, /->! L- • 1- 11 -J fin the Adriatic Sea and] ,,j ^ 



1. Globigerinabulloidcs | ^^^^ q^^^^ }- W. C 



2. helicina . , . . — — ^— — 



3. Rosalina globularis . 



'■ 'Sral ociur":} NO"- Sea.„earC„xha,e„ 



.5. Rotalia globulosa 



stigma 



— : 



— (Synon. Planu- 

 lina?) turgida . . 



8. Textilaria aciculata 



,and 



Adriatic and the Ocean 



.— globulosa . . . North Sea. 



Fossil. 



Denmark. 



W. C. Cattolica. 

 W. C. Gravesend. 



W. C. Cattoh'ca. 



f W. C. in Russia, Poland, 

 Prussia, Denmark, 

 England, France and 

 Sicily; and C. M. in 

 Greece, Zante, Sicily 

 and Oran. 



W. C. Cattolica. 



C. M. Caltasinetta. 



W. C. England, France, 

 Prussia, Denmark. 



C. M. Oran. 



C. C. Egypt and Arabia. 



W. C. Prussia, Den- 

 mark, England and 

 Sicily. 



C. M. Greece. 



C. C. Egypt and Arabia. 

 ^W. C. of all European 

 countries, from Wolsk 

 to Ireland. 



C. M. Sicily, Oran, and 

 Greece. 



C. C. Egypt and Arabia. 



10. 



11. 

 12. 

 13. 



14. 



15. 

 16. 



Actinocyclus 

 rius . . . . 



Siliceous'shelled Irifusoria, 



quina 



biternarius 



septenarius 



octonarius . 



nonarius . . 



denarius . . 



undenarius . 



bisenarius . . . 



quindenarius . 



Amphitetras antedilu 

 viana 



/ North Sea, Tjbrn Isle in \ 

 \ the Cattegat J 



C. M. CaltasinetU. 



TVT u o rr.-" J C. M. Oran and Caltasi- 



North Sea, Tjorn . . . .| ^^^^^ 



North Sea, Cuxhaven, J C. M. Oran, Caltasinet- 

 Christiania, Tjorn . . • \ ta, and Greece. 



North Sea in the Cattegat j ^- ^' 0/%"' Caltasinet- 

 ° \ ta, and Zante. 



r C. M. Oran and Caltasi- 



\ netta. 

 N. Sea, Cattegat near Tjorn. C. M. Oran. 

 C. M. Oran. 



' I C. M. Oran and Zante. 



C. M. Oran. 

 C. M. Oran. 



C. M. Oran and Greece. 



and Bay of Christiania 

 Cattegat near Tjbrn 



2 C 2 



