INFERIOR OOLITE. 



15 



undistinguishable in lithological character from the freestone of Bath (Great Oolite), although 

 that rock is of more recent date 1 . 



3rd. Lower Ragstone. Very fine-grained, hard Oolite; some beds largely quarried as trough- 

 stones. The Oolitic structure becomes coarser downwards, and passes into a rough concretionary 

 rock at the base of the formation. 



The prevailing fossils of this central division are Clypeus sinuatus, Terehratula fimbria, T. glo- 

 bata, and T. perovalis. 



(c. of section.) The lowest member of the Inferior Oolite has a remarkable aspect. It is of a rusty 

 brown colour, and is in great part made up of small flat concretions, from a quarter to half an inch 

 in diameter, which give to the stone, on first inspection, the appearance of a Nummulite rock. It is 

 called " Pea Grit " by the country people, and is a useful stone, when employed for gate-posts and 

 other rough work. Coralline bodies and Pentacrinites are spread over the sandy iron-shot faces of 

 the beds, and veins of crystallized carbonate of lime are of frequent occurrence throughout the 

 strata. 



The organic remains of the formation in these hills are very numerous, the following, 

 collected by myself, being probably but a small portion of those which will hereafter be 

 found. 



Fossils of the Inferior Oolite of the Cottesiuold Hills' 2 \ 



Ammonites Brownii. M. C. t. 263. and por- 

 tions of other species of Ammonites. 



. corrugatus. M. C. t. 451 . f. 3. 



elegans f M. C. t. 94. 



Belemnites (portion of). 



Berenicea diluviana. Lamouroux, Expos. Me- 

 thod, t. 86. f. 12 & 14. M. C. t. 424. 



Cirrus carinatus. M. C. t. 429. 



Clypeus sinuatus. Parkinson, Organ. Rem. 

 vol. hi. t. 2. f. 1. 



Corals (of several species). 



Gervillia . Species same as in Normandy. 



Gryphcea Cymbium. Lamarck; see Deshayes, 

 Coquilles Caracterist. des Terrains, pi. 12. 

 f. 1 & 2. 



Isocardia concentrica. M. C. t. 491. f. 1. 



rostrata. M. C. t. 295. f. 3. 



Modiola gibbosa. M. C. t. 211. f. 3. 



Modiola plicata. M. C. t. 248. 

 My a calciformis. Phill. t. 11. f. 3. 

 Natica adducta. Phill. t. 11. f. 35. 

 Ostrea acuminata. M. C. t. 135. 



Marshii. M. C. t. 48. 



solitaria. M. C. t. 468. f. 1. 



Pentacrinites. 



Pholadomya ambigua. M. C. t. 227- 



— Fidicula. M. C. t. 225. 



obtusa. M. C. t. 197- f. 2. 



Pecten. Species undetermined. 

 Plicatula. Species undetermined. 

 Plagiostoma cardiforme. M. C. t. 113. f. 3. 



giganteum. M. C. t. 77- 



Parkinsonii. M. C. t. 307. 



punctatum. M. C. t. 113. f. 1 & 2. 



Terebratula emarginata. M. C. t. 435. f. 6. 

 fimbria. M. C. t. 326. 



1 See note on Mr. Lonsdale's discoveries, supra, p. 13. 



2 The greater number of the organic remains in this list have been named and figured by Mr. J. De C. 

 Sowerby, in his work "Mineral Conchology." The letters M. C. refer the student to that book, which forms an 

 essential part of every Geological Library. Some of the fossils are to be found in Phillips's " Geology of York- 

 shire." 



B 2 



