fc \z 



& 



Ashgillian. 





%1 1 



PQ _ 



5 » o * 



8* § ** § « 



&a § 'I § 'I 



^ _£ 'o S ^ f 



-3 a > s » 3 



■« o on o CQ O . 



*- S 8 ° ".3 ,3 -S 



?»3 



'a e 3 ti^"s - 



II II II II II II II 

 < oq ^ qd # o fr 



&' d i-i 



Silurian. 



£"3 5 



SQ 



if. 



Hlcepq 

 II II II 



