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



27 



1 

 g 



CD 

 P 



a 



ö 



cr 

 p 



O: 

 re 



P 



o" 



■-i 



p 



ca' 



p: 



■a 

 B' 



K' 



C» 



o 



o 



O: 



B' 



ra 



s g. 



t-l 



C2 



g- 



g- 



5" 

 era 



p 



d: 



CR 



O' 



p 





C3 



c 



E 



fr 



o 



er 

 a 



Stratigraphical distribution. 



Only found. 

 in 



Common 

 to 



a 



b c 



all 

 strata 



ab 



be 



13 



a 

 a 



8 



21 



23 



8 



5 



27 



8 



35 







c 

 c 



c 



c 

 c 



c 



5 



10 

 a 



5 



4 



13 



6 



28 



* 



10 



* 

 * 



67 



* 

 * 

 * 



* 



* 

 * 



* 



* 



* 

 * 

 * 



* 



26 

 * 



8 



* 



16 



15 i 



8 1 



21 



23 i 



8 



5 i 



27 



8 1 



42 



5 



11 1 



5 



4 



13 



6 i 



29 



12 



81 



27 



9 



16 



