432 REPORT— 1880. 



(58-1) HOPKINSON, J. On Britisli Graptolites, Journ. Qiielcett Micros. 

 Club, vol. i. (part 8), p. 151. 



(582) HuiiL, E. On the Evidences of a Ridge of Lower Carboniferous 

 Rocks crossing the Plain of Cheshire beneath the Trias, and forming the 

 boundary between the Permian Rocks of the Lancashire Type on the 

 North, and those of the Salopian Type on the South. Quart. Journ. Geol. 

 Soc. vol. XXV. p. 171. 



(583) M'CuLLOUGH, Dr. D. M. The Cornstones of Herefordshire and 

 Monmouthshire. Trans. WooUwpe Nat. Field Cluh for 1868, p. 8. 



(584) Mackintosh, D. The Scenery of England and Wales; its 

 Character and Origin. 8vo. Land. 



(585) Manisty, G. E. Visit to Esgair [refers to Glaciation]. Bej>. 

 Marlborough Coll. Nat. Hist. Soc. for the half-year ending Midsummer 

 1869, p. 16. 



(586) Morton, Gr. H. Palseontological Observations on the Carboni- 

 ferous Limestone in Flintshire. Proc. Liverpool Geol. Soc. session 10, 

 p. 75. 



(587) Owen, Prof. R. Notes on Two Ichthyodorulites hitherto unde- 

 scribed. Geol. Mag. vol. vi. p. 482. 



(588) Pattison, S. R. Slate and Slate Quarries, geologically and 

 commercially considered. (Reprinted from the Mining Journal.) 8vo. 

 Land. 



(589) Roberts, D. W. Notice of certain Concretions found in the 

 Upper Silurian Rocks of Denbighshire, North Wales. Trans. Edin. Geol. 

 Soc. vol. i. p. 253. 



(590) Salter, J. W. On a New Pterygotus from the Lower Old 

 Red Sandstone. Hep. Brit. Assoc, for 1868, Sections, p. 78 [a few lines]. 



(59^) Some New Points in the Geology of the Usk District. 



Trans. Woolhope Nat. Field Club for 1868, p. 174. 



(592) [Notes on] Cephalaspis Asterolepis and Homalonotus 



Johannis. Ibid. p. 240. 



(593) ^^^ H. Hicks. On some Fossils from the ' Menevian 



Group.' Quart. Journ. Geol. Soc. vol. xxv. p. 51. 



(594) Symonds, Eev. W. S. Address on the Geology of the District 

 (Penwylt, &c.) Trans. Woolhope Nat. Field Club for 1868, p. 68. 



(595) Ttlor, a. On Quaternary Gravels. Quart. Journ. Geol. Soc. 

 vol. xxv. p. 57. (S. Wales, p. 66.) 



1870. 



(596) Adams, W. The Characteristics of the Cefn~on Tunnel. Trans. 

 Cardiff Nat. Soc. vol. ii. p. 32. 



(597) Oil t^e Geological Features of the S. Wales Coalfield. 



Journ. Iron Steel Inst. vol. i. p. 13. 



(598) AiTKEN, J. The Grit-rocks of the Eastern Border of North 

 Wales. Geol. Mag. vol. vii. p. 263. 



(599) On Productus Llangollensis, from the Eglwseg Rocks, 



Llangollen, North Wales. Trans. Manchester Geol. Soc. vol. ix. (No. 1), 

 p. 9. 



(600) Davies, D. C. On the Millstone Grit of the North Wales Bor- 

 der. Geol. Mag. vol. vii. pp. 68, 122. 



(601) Dawkins, W. B. The Denbighshire Caves. Trans. Manchester 

 Geol. Soc. vol. ix. (No. 1), p. 31. 



(602) Evans, F. G. On some Silicious Stones found in the Coal 



