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to 





v. 



• or 1 



• ft*. 



1 K | 



F 



:bi 



ll ij 



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» 





i' 



X- 



s 



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9 





GEODES AND SEPTARIA. 



95 



rutile (oxide of Titanium). From the junction of New Red Upper 

 Marl and Carboniferous Limestone. — Chepstow, Monmouth- Galleky - 



shire. Wall-case 44. 



(See " Memoirs of Geological Survey," vol. i., part 1 p 

 246.) 



37. — Geode, composed of quartz and imperfect red jasper, 

 from the junction of New Bed Marl and Carboniferous Lime- 



stone. 



Monmouthsh 



38. — Two specimens of nodular 



Upper 



Wight 



39. 



/' 



One mile north of Brixton, Isle of 



of 



fi 



40. — Nodular concretions of sand, 

 sand.— East Cliff, Hastings, Sussex. 

 Percy, F.R.S. 



II 



Presented by Dr. 



41 — Nodule of argillaceous limestone, formed round the 



skeleton of a fish (Mallotus). 



W 



Drift. — Upp 



42. 



Portion of a septaria, showing the internal con- 



cretionary structure, the cracks, and the filling of these by 

 infiltration, with crystalline carbonate of lime. 



43. — Concretionary nodule of clay ironstone, from 



pipe-clay beds of the Lower Bag shot series. — Branksea 



Poole 



44. 



Presented by Colonel Waugh. 



Coal Measures. — Bedworth, Wa 



fi 



45. 



Wenlock 



showing the mode of occurrence of such nodules. Part 



of the surrounding Wenlock shale is attached. — Seven 

 miles north-east of Cerrig-y-drziidion, Merionethshire. 



46 — Nodule of argillaceous limestone, from Wenlock 

 Shale. (See horizontal section No. 5).— Near Llanfaredd, 

 Bmlth, Breconshirc. 



Nodule of argillaceous limestone, from Wenlock 



47. 



Shale.— Pen-y-bont, Radnorshire. 



48 — Septaria, cement stone 



occurring in 



occasional 



