174 



R. F. TOMES (W THE GREAT-OOLITE MADREPORARI A . 





1. 



2. 



1 

 3. | 4. 



5. 



6. 



7. 



Cladophyilia Babeana 



Oonfusastrasa magnifica 



Isastraea limitata 



* 



* 

 * 



* 



* 



* 

 * 



* 



* 



* 

 * 



* 

 * 



* 

 * 



gibbosa 



Beesleyi 



explanulata 



Latimasandra lotharinga 



Chorisastrsea obtusa 



Astrocoenia Pbillipsi 



Anabacia coinplanata 



Tricycloseris liraax 



Thamnastrasa mamniosa 



Lyelli 



Waltoni 



■ microphylla 



Oroseris Slatteri 



Comoseris vermicularis 



Microsolena excelsa 



regularis 





Column no. 1 includes the species found at Glympton, no. 2 those 

 from Epwell, no. 3 those found in the Rollright cutting, no. 4 the 

 Stonesfield species, no. 5 the Burford ones, no. 6 those from Ayl- 

 worth, and the 7th and last column is devoted to the Fairford corals. 



On looking over the foregoing lists of species it will very readily 

 be observed that there is a strong general resemblance existing 

 between those from all the localities given. This remark will 

 apply to both genera and species. One species, Isastrcea limitata, 

 is recorded as occurring in six out of the seven localities ; while 

 Microsolena excelsa and Thamnastrwa Lyelli, have been observed 

 in four of the seven ; and Cladophyilia Babeana and Thamnastrcea 

 mammosa have been taken from three localities. 



Bearing in mind the great general similarity of the species in 

 these lists, and remembering also that they occur in beds occupying 

 very different stratigraphical positions in the Great Oolite, we are un- 

 able to conclude that these coral-beds are any thing more than the 

 repetition of each other, and that no satisfactory division of the 

 Great Oolite could be made by means of the coral-fauna. In this 

 respect it differs much from the Inferior -Oolite, the coral-beds in 

 which, as I have elsewhere shown, contain each its own assortment. 

 of species. 



It may perhaps be well to observe that as we proceed from Fair- 

 ford to Burford, and thence to Stonesfield and Rollright (that is, in 

 a more or less northerly direction), these coralline deposits occur in 

 "egular gradations lower in the series of the Great Oolite. To this, 

 however, very little importance must be attached, as we cannot as- 

 sume that deposits of corals may not have existed above those of 

 Eollright and Stonesfield, or that they do not now exist, hidden in 

 the strata, below those of Burford and Fairford. 



