308 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. (Mar. 18, 



choneUa spinosa, and, more rarely, R. acuta, Sow.*, R. ringens, and 

 R. Forbesii, with many other shells. The fossils of the lower part 

 of the bed are chiefly Conehifera. 



Following the escarpment of the hills northward, past Blackford 

 and Yarlington, we meet with numerous exposures in one or both of 

 these beds, and near Castle Cary and at Hadspen the lower one was 

 formerly extensively quarried. In the former locality the Lower 

 Eagstone contains Clypeus Agassizii, and in both Clypeus altus occurs, 

 while in the latter, as also in the quarries near Bruton-Bradstock, 

 Terebratula sphceroidalis is met with in immense numbers. Ammo- 

 nites are rare. 



At Sunny Hill, near Pitcombe, between Castle Cary and Bruton, 

 in a quarry above the Eailway Station, we find the following section, 

 which, as it is at some distance from the last, will serve to show the 

 persistence with which these two subdivisions preserve their cha- 

 racters. 



Section at Sunny Hill. 



A. Upper Eagstone. Coarse, white, flaggy oolite 6 



B. Lower Eagstone : — 



1. Hard, brown, thick-bedded, highly fossiliferous limestone 12 



2. Hard, sandy, compact, light-coloured limestone, with a 



few fossils 2 



In this quarry the fossils of the Lower Eagstone are chiefly Con- 

 ehifera and Brachiopoda. It is worthy of remark that the only 

 Ammonite observed was Ammonites ParJcinsoni. Among the fossils 

 noticed were RhynchoneUa spinosa, R. angustata, Terebratula Phil- 

 lipsii, T. spliwroidalis, Gryphaia subloba, Desh., Ostrea piriformis, 

 Wr., Lima gibbosa, Trigonia costata, Pholadomya Heraulti, Holectypus 

 liemisphazricus, &c. The bed No. 2, or basement-bed, contained a 

 few fossils, very difficult to extract. 



In the quarries around Bruton, and in the railway- cutting near 

 the church, both series of beds are exposed, as also on the road 

 through the Hedgestock turnpike-gate to Batcombe, and at Creech 

 Hill. At the latter locality, ascending the hill from Lamyat, through 

 a deep lane-cutting in the Ammonite-sands, to the brow of the hill, 

 the lower fossiliferous limestone, not well exposed, is seen above the 

 sands, and above this the Upper Eagstone, which is here about 15 

 feet in thickness, and is, in part, a tolerably thick and evenly bedded 

 rock, while some of its beds exhibit lines of oblique lamination. 

 About the middle of these upper beds there is a layer in which the 

 fossils have the shell preserved. 



The hard, pale-coloured, sandy limestone which formed the base- 

 ment-bed of the Lower Eagstone in the sections at the " Halfway 

 House " and at Sunny Hill does not appear to be continued much 

 further to the north, as it was not observed at Creech Hill, and is 

 absent at the Yallis Farm, \\ mile north-west of Frome, where, in 

 the quarry on the right bank of the stream, the Lower Eagstone is 



* I am not aware that this fossil has hitherto been recorded as an Oolitic 

 species. 



