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



23 



2 



3 



5' 



er 

 p 



O: 



P 



3 



5' 



> 



ra 



o 



p 

 p: 



PC 



5' 



sr 



CO 

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P 



O 

 p: 



2 





cr 



C- 

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O: 



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SJ 



ca 



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s 



Stratigraphical distribution. 



Only fouod 

 iu 



Common 

 to 



a 



b 



c 



all 

 strata 



ab 



be 



9 



a 



a 

 a 



7 

 c 



12 

 6 



6 



6 



b 

 c 



10 



c 







c 



c 



c 

 c 



c 



5 



c 

 c 



3 







c 



c 



21 







a 

 a 



5 



a 

 a 



18 



c 

 c 



c 



c 

 oc 



3 







8 



a 



4 







4 

 



11 



2 

 











b 



24 



* 



6 

 



* 



27 

 * 

 * 



* 



* 

 * 



* 

 * 

 * 

 * 

 * 

 * 

 * 

 * 

 * 

 * 

 * 

 * 



* 



* 

 * 



17 







* 



* 

 * 

 * 

 * 

 * 



6 



9 



* 

 * 



12 



8 



17 



17 



7 



5 



24 



1 



23 



3 



9 



4 



4 



11 



3 



26 



7 



47 



23 



6 



12 



