536 TKOCEEDINGS OF THE GEOLOGICAL SOCIETY. 



latus, and A. Biicldandi, and in part also even with A. Sauzianvs 

 and A. semicostatus. 



M. Martin, in his Table of the " Infralias " deposits, gives, in the 

 ■whole, 213 species, including those of the Ehsetic Beds, wliich I have 

 not classed with the Lias. Of these, 176 are found on the horizon of 

 the Ammonites angulatus (A. Moreanus), only 45 of which in the 

 districts he notices pass into beds with Gryplicea incurva. In this 

 country nearly the whole fauna is in association with that shell : I 

 recognize 69 more of the continental species in association with that 

 shell, making 114 in the whole. Many other species have not yet 

 been found common to both; but, as far as they have been recognized, 

 nearly the whole of the continental fauna of the " Infralias " are 

 in association with GryplKEa incurva and are found also in the 

 chambers of Ammonites Biicldandi. 



In Dr. Duncan's paper " On the ' Infralias ' Corals," he has in- 

 ferred that the Brocastle, Ewenny, and other deposits have no strati- 

 graphical succession, and that most of the sections from which I 

 obtained the coral-fauna are on the same horizon ; but in this I am 

 compelled to differ from him. Where the beds are removed from the 

 metamorphosing influence of the Carboniferous Limestone, their 

 correlation with the Camel section is quite clear, and their horizons 

 can generally be recognized. Thus at Stormy is seen the passage 

 from the Keuper into the Ehaetic beds, and from these again into the 

 Ostrea-beds, with the Ammonites planorhis still higher. The same 

 horizon is clearly defined in the Church quarry at Laleston, though 

 here the Sutton- Stone mineralogical character is assumed by the 

 beds at the base of the quarry, instead of on the higher horizon at 

 Sutton. In Dr. Pritchard's quarry at Laleston, the Ostrea-series 

 is present, quite as regularly* bedded as at Camel. The same occurs 

 also at Llanbethian, where above the Ostrea-beds those with A. 

 jplanorhis occur. The above represent the beds of the Camel section 

 to the A.-planorhis zone. The only corals to this point are TJiecos- 

 milia MicJielini, a flat Montlivaltia, and very fragmentary evidences 

 of Astroccenia. Gryphoia incurva has not yet appeared ; and its 

 presence so abundantly on the horizons of Sutton, Brocastle, &c. 

 would imply that they are still higher in the Liassic series. 



Next I should be disposed to place the Sutton Stone proper, and 

 its equivalent at Windsor Hill, Shepton, in which occur A. Cony- 

 heari and A. Bucklancli ; whilst above this, if not parallel with it, 

 the normal conditions of the latter beds appear. 



Mere lithology is of no value in comparing these peculiar deposits ; 

 nor is the presence or absence of certain species alv/ays a safe guide ; 

 for although, from the general facies of the fauna as well as from 

 their lithological similarity, the horizons of the Sutton and Shepton 

 beds are seen to be the same, yet not a single Sutton coral is present 

 in the latter, and a species of Montlivaltia, which does not occur at 

 Sutton, takes their place. 



Although there are certain species of corals and moUusca common 

 to Sutton and Brocastle, my view is that the latter are on a higher, 

 and probably the highest horizon of any Liassic deposits in the dis- 



