KONGL. SV. VET. AKADEMIENS HANDL. BAND. 19. N:0 6. 



21 



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5 



5' 



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fil 



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oq 



5" 



r 





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3 



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Stratigraphical distribution. 



Only found 

 in 



Common 

 to 



a 



b 1 c 



strata! "*> ^^ 



3 



a 

 a 



a 

 a 



6 

 & 



7 







b 



7 



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c 



3 







c 



b 



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16 

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a 

 a 



a 



2 



a 

 a 



a 



11 



c 



a 







c 

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c 



3 



5 



a 







a 



a 



4 



2 



b 

 b 















9 

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a 



2 



13 



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* 



* 

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5 



* 



16 



* 

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* 



* 

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* 

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9 



* 

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* 

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* 

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3 



* 



* 



7 



* 







* 



9 



7 



12 



10 1 



5 



2 1 



21 1 



5 



18 1 



3 j 



8 



4 



4 



11 



2 



24 



6 



27 



17 



6 



9 



