174 E. F. TOiCES Oy MADP.EPOEAEIi. 



ft. in. 



1. Surface-soil and shattered stone 4 



2. Compact yellow stone 3 



3. Hard yellow stone divided into 3 or 4 layers, and containing a 



few corals 5 



4. Yellowish oolitic stone, much bored vertically by Ann elides ?, but 



containing n corals 1 



5. Coral bed. This very closely resembles bed 4, and like it is bored 



vertically 5 to 6 



6. Bath Oolite, hght in colour and oolitic in texture, containing 



very few fossils and forming the bottom of the quarry. Depth 

 not ascertained. 



The following are the species which have been f onnd in the above 

 coral-bed by Mr. T. J. Slatter and myself : — EnaUohelia socialis, 

 n. sp., Bathyccenia Slatteri, TTiamnoccenia oolitica, Sci/pJiocceyiia? , 

 BarysmiUa EtalJoni, StylosviiJia exceha, Stylina Floti, Cryptoccenia 

 Pratti, ConvexastrcEa Waltoni, MontJivalfia caryopJiyllata, a Jlont- 

 livaltia with a naked costulated wall, CalamophyUia radiata, 

 Isastrcea limitaia, I. serialis^ I. micropTiyTla, Latimceandra, sp., 

 ChonsastrcBa ohtiisa, Platastrcea CoJiyheari, Oroseris Slatteri, Dimor- 

 jphastrcEci fungiformis, n. sp., Anahacia comjplancda, MicrosoTena 

 exceha. 



Tbe bed in which the corals occur has not at all the appearance of 

 a coral-bed, properly speaking, but is like a deposit into which the 

 corals have been drifted from some near coral-bank and scattered 

 about, not in any place thickly, though they are not anywhere 

 absent. It is a distinctly oolitic layer, and the round grains of 

 which it is composed, as is not unusual in the Great Oolite, have 

 eaten into the imbedded organisms, and destroyed their external 

 details. Sucb is the condition of many of the corals from the Great 

 Oolite of Combe Down, though occasional specimens may be met 

 with which are in a fair state of preserration. 



Of the exposures on the Hampton Downs, I am unable to give 

 detailed sections ; but at the south end of that plateau are some 

 ancient and abandoned excavations, which are usually denominated 

 the Hampton Eocks, in the upper part of which is a bed which, from 

 the abundance of sponges it contains, was called by the late Mr. 

 Moore the Sponge-bed. Immediately overlying it is the surface- 

 soil, mixed with a considerable quantity of shattered stone. This 

 is a broken-up coral-bed containing many corals. They are mostly 

 in a bad state of preservation ; and as very few could be determined 

 satisfactorily, a list of the species has not been prepared. 



There is also on the same ridge, northward of the Hampton Eocks, 

 a large and disused quarry lying immediately behind the rifle-butts, 

 and now known as the Butts-quarry. In the upper part of it is a 

 well-marked coralliferous layer. It is three or four feet above the 

 beds of dense and massive building-stone for which Bath has been 

 so long and justly celebrated. Prom it have been procured the 

 following corals : — 



Stylina Ploti, Cryptoccenia micropliylla, ConvexastrcBa Waltoni, 

 Montlivaltia, sp., Isastrcea explanidata, a massive varietj% CTioris- 

 astrcea obtusa, Thamnastrcea scita, TJiamnastrcea, sp., Oroseris 

 Slatteri, DimorpTiarcea, a small species, Comoseris vermicularis, 

 Anahacia complanata, Microsolena eoccelsa. 



