188 NOTES ON THE LIAS IN THE NEIGHBOimHOOD OF EADSTOCK. 



teristic of M. Lias. The top beds of the M. Lias have a little 

 tendency to lamination and split up into flags. They are full of 

 a small Pleuromija and a fine Astarte which seems allied to 

 A. sultetragona, Mu.; it invariably, however, leaves its shell 

 imbedded, and comes out of the rock an internal mould, so 

 that it is not easy to obtain specimens. The top of the quarry is 

 formed of 2 to 3 feet of clays, which form a part of the Upper 

 Lias Clays apparently. 



The table which follows is intended to summarize our observa- 

 tions on the distribution of Ammonites and Brachiopoda in the 

 district. Separate columns are given to the quarries selected, 

 which are grouped under the headings of Lower and Middle Lias. 

 "Where it has been possible to give the exact bed in which a fossil 

 "was found, the letters used for that bed are cited in the column ; 

 but where a specimen was not found m situ, or in the case of the 

 M. Lias, where the section has not been divided up into beds, an 

 asterisk is used to denote the occurrence of species. In other 

 respects the table will be intelligible of itself. - 



In conclusion we hope that others will be found to help work 

 out the life-history of the Lias in this district. It has an 

 interesting facies, and as to fossils is the richest that we know of in 

 some respects. There are in the M. Lias evidently a variety of 

 forms to reward the searcher, both of beautifully preserved 

 Gasteropods and Ammonites. The Lamellibranchs and Belem- 

 nites require careful collecting, and will no doubt also repay the 

 worker. At present we have indication of several species 

 insufficiently preserved for identification. 



