Mr. Lonsdale on the Oolitic District of Bath. 271 



water-worn pebbles of every formation from the Wiltshire Downs to the 

 Mendip Hills. The most interesting circumstance connected with the gravel 

 of the district to which this memoir belongs, is the existence of chalk flints on 

 some of the isolated downs and hills in the neighbourhood of Bath. They 

 occur abundantly on Farleigh Down and Hampton Down ; but the latter is 

 separated from the former by the deep valley of Warley, and its prolongation 

 is everywhere bounded by precipitous escarpments. In the vicinity of Cher- 

 hill the surface of the chalk has been worn, in many places, into deep pits, 

 and afterwards filled with flints, which are now dug for the repair of the roads. 

 The sides of the pits are often lined with layers of a very ferruginous clay, 

 which has a smooth, slickenside appearance. 



In the gravel-pits in the neighbourhood of Bath the remains of Mammalia 

 are frequently found. At that near Larkhall the following vestiges of the 

 former inhabitants of this island have been procured : 



Elephas Grinders of the Mammoth. 



Sus Molar teeth. 



Rhinoceros t ichor hinus , ,Mo\a.r teeth, scapula? and metatarsal bone. 



Equus Incisor and molar teeth. 



Bos Molar teeth, tibia;, humerus, astragalus, os calcis, and cervical 



vertebras. 

 Ursus? Canine tooth. 



Alluvium*. 



The springs used for domestic purposes in Bath abound with carbonate of 

 lime, which they precipitate in great quantities in the pipes by which the 

 water is conveyed to the city. The rivulets are likewise strongly charged 

 with lime, and often coat their banks with a thick crust of tufaceous matter. 







Organic Remains \. 





Geol. Position. 



Class. Genus. 



Species. 



References. 



Loch 



Lias . . 



Polyparia. Alcyonium? 







Weston. 





Radiaria. Pentacrinites 



tuberculatus. 



Miller, Crinoidea. 



Ibid. 





Echinus. 







Ibid. 





Crustacea. 

 Conchifera.Pholadomya 



ambigua. 





Saltford. 





Min. Con. Tab, 227. 



Radstock. 





Cardita? 

 Unio 



concinnus. 





Corston. 





Ibid. Tab. 223. f. 1.3. 



Weston. 





Modiola 



Hillana. 



Ibid. Tab. 212. f.2. 



Ibid. 





Lima 



antiquata. 



Ibid. Tab. 214. f.2. 



Ibid. 





Avicula 



iofcquivalvis. 



Ibid. Tab. 24i. f. 2. 3. 



Ibid. Radstock 





Plagiostoma 



gigantea. 



Ibid. Tab. 77. 



Ibid. 







punctata. 



Ibid. Tab. 113. f.1.2. 



Ibid. 







duplicata. 



Ibid. Tab. 559. f.3. 



Ibid. 



* The author is indebted for the above list to bis friend II. Woods, Esq. F.Z.S. &c. 

 f In this Table those fossils only are detailed whicli were procured by the author. 



