FKOM THE GREAT OOLITE. 173 



Bed 4 is very peculiar. It is honeycombed through and through 

 with large perforations, and where the soft in-filling of the hollow 

 places has weathered out, is rauch used for rustic rockwork. 



Beds 5 and 6 are very much alike, and the latter might almost be 

 regarded as the bottom part of number 5, but they have been 

 separated in the section to define more exactly the position of the 

 corals. 



I have determined the corals from bed 6 as follows : — Stylo- 

 smilia reptans^ n. sp., Styllna solida, S. conifera, Cryptocoenia, sp., 

 Convexastrcea Waltoni, Isastrcea limitata, I. gibhosa, I. Beesleyi, I. 

 tuherosa, Latimceandra lotharinc/a, Latimceandra, sp., GladophyUia 

 Baheana, Thamnastrcea Lyelli, Thamnastrcea, sp., Anahacia com- 

 planata, and Microsolena excelsa. 



The examples of Isastrcea gihhosa are singularly fine, and one of 

 them, forming part of Mr. Brown's collection, now in the Oxford 

 Museum, is very remarkable. It has long radiating finger-like 

 processes springing from the original gibbous mass. 



The most abundant coral in the Lime-kiln quarry is Conveoo- 

 astrcea Waltoni, One specimen obtained by Mr. Brown is more 

 than a foot in height, and consists of a mass of parallel corallites, 

 apparently all springing from one base ; so far as I could see, none 

 of them were ramified. 



A small and delicately formed Stylosmilia, which has also been 

 met with at Parley Down near Bath, occurs with the Convescastrma ; 

 and the association of the two species, here and at Farley Down, 

 would seem to indicate that the coral-beds of these two localities 

 may be identical. 



The want of a more extensive collection of Great Oolite corals 

 from the neighbourhood of Bath, from which district so many of 

 the types of MM. Milne-Edwards and Haime were derived, as well 

 as of a more intimate personal knowledge of the strata from 

 which they were taken, has long been an obstacle to me, not only 

 in working out the stratigraphical distribution, but also in the 

 determination of the species of Great Oolite corals. This want has 

 now been in a great measure relieved by recent examinations of the 

 exposures on Farley Down, Combe Down, and Hampton Down. 

 These are the particular localities, it may be remembered, which 

 furnished many of the specimens from which MM. Milne-Edwards 

 and Haime drew up their descriptions of Great Oolite corals. The 

 results of researches, made in company with my friend and frequent 

 companion in the field, Mr. T. J. Slatter, and with the Eev. H. H, 

 Winwood, I will now proceed to give. 



In a rather extensive and long-since abandoned quarry on the 

 south side of Combe Down is the following section : — 



Q. J. G. S. No. 162. 



