Fossil Fish in Rocks of the Mansfield District. 7 



ing to light yellowish-brown on exposure and loss of lime. 

 No. 5 excavation was on this bed.* Then twenty feet of 

 rock (G) similar to A, are met with. We now reach a most 

 interesting bed (H) (excavation No. 4) about nine inches in 

 thickness, of calcareous and micaceous sandstone, of varying 

 colour ; the prevailing rock being of a dense, dark, bluish- 

 grey, having lenticular patches, some of a yellowish, and 

 others of a green tint. 



Material similar to the lower bed A was then passed 

 through in bed I for twenty feet. 



J is a six-inch bed of brecciated fine-grained calcareous 

 sandstone, resisting the action of the weather, and ledging 

 out, having a very mottled appearance. 



K is eight feet of similar rock to A. 



L is a six-inch mottled bed similar to J. 



M has six feet of similar material to A, except that it is 

 lighter, being more of a chocolate colour ; and in N for four 

 inches J is repeated. O again repeats M. 



P is an eight-inch stratum, similar to J in being mottled, 

 though of a lighter colour, changing to a yellowish-brown on 

 exposure, but having on its under side lenticular masses of 

 siliceous and calcareous breccia of a dark purplish colour, on 

 which No. 6 trench and excavation were made. 



Q has four feet more of the chocolate-coloured rubbly 

 shales similar to M ; and in R we have the bed in which the 

 greatest amount of excavation was done, as on it were 

 situated Nos. 2, 3, and 7. It is a six-inch, highly-laminated, 

 chocolate-coloui'ed shale, slightly calcareous, scaling off in 

 thin flakes, and containing oval-shaped lenticular masses of 

 dense, dark purplish calcareous sandstone, changing to a 

 lighter colour on exposure. 



The S bed immediately above this again resembles M for 

 four feet, and then a nine-inch bed (T) of dense dark stone, 

 changing to light chocolate or claret-coloured ferruginous and 

 micaceous sandstone is seen. 



Resting on this is a twelve feet bed (U), similar to M. 



V is a two-feet stratum of irregularly-bedded ferruginous 

 gandstone shale. 



Above this is another two-feet bed (W), and highest of the 

 series on this side of the river, though occurring only on the 



• The numbers of the excavations are in the order of their commence- 

 ment. For facilitating recognition by the workmen, and the correct reference 

 of the fossils to their proper beds, the numbers of the excavations were 

 fixed to each specimen. 



