'■8"'Rep.^rtBntAssoc 1SS8 



Plate TJL 



Fiq. 7. (155) 



i%. 8. (69) 



Fi^. 9. (66) 



Fig 10. ( ZOj 



Illustrating theJlepcrt an/ the^ JRcroscopic Stnutu/^ of the Older Hocks of 



