70 



MARSUPIALIA. 



The subjoined cut, from Dr. Fitton's paper on the strata 

 from whence the fossil jaws of the Amphitheria and P/tasco- 

 lotheria were obtained, represents the section of the super- 

 incumbent beds, taken through a shaft sunk to a pit or 

 gallery in which the " slate," (as it is called,) is worked. 



On the side opposite the right hand is marked the depth 

 of the shaft to the horizontal gallery where the slate is dug, 

 which contains the Mammalian fossils ; on the opposite 

 side, the strata are numbered in succession as follows : 



1. Rubbly limestone (Cornbrash). 



2. Clay, with Terebratulites. 



3. Limestone rock. 



4. Blue clay. 



5. Oolitic rock. 6. Blue clay. 



7. Rag, or oolitic limestone. 



8. Sandy bed, containing the " Stones- 



field slate." 



