142 Mr Tawney, On the Upper Bagshot Sands of [Nov. 28, 



AVight, these sands are termed Headon Hill sands, and estimated 

 [p. 228] at 120 feet. At White Cliff Bay these sands are said to be 

 195 feet thick [No. 20 of pi. ix. f. 2, pp. 228, 243, 253]. They are 

 supposed to be without organic remains, though he remarks that 

 Prof. Sedgwick had found marine shells in the equivalent bed at 

 Hordwell. The succeeding passage mentioning marine and estuary 

 fossils at Hempstead refers of course to beds far higher in the series, and 

 now classed as Miocene. 



1846. S. Wood. On the Fossils and Geological Phenomena of 

 the Hordwell Cliff. Charlesworttis Geol. Journ. i. p. 117. Merely 

 mentioned the sands again as containing 27 genera of marine Mollusca. 



1852. A. Dumont. Observations sur la Constitution Geologique 

 des terrains tertiafres de TAngleterre compares a ceux de la Belgique. 

 Bull. Ac. R. Belg. xix. In the table at end of the essay the Headon 

 Hill sands are grouped with the Barton clay as equivalent respectively 

 to the upper and lower divisions of the Belgian Laekenien, while the 

 Headon Hill limestones and marls are placed in the Tongi-ien. 



1852. E. Hubert. Comparison des couches tertiaires inferieures 

 de la France et de TAngleterre. Bull. Soc. Geol. Fr., Ser. 2, t. ix. p. 350. 

 In a table in which a parallel is drawn between the deposits of the 

 Hampshire, Thames and Paris basins, these sands are correlated with 

 the unfossiliferous sands of Monneville and of the Mortefontaine heath 

 [that is to say the upper part of the sables de Beauchamp]. 



1852. Marchioness of Hastings. Description geologique des fa- 

 laises d'Hordle, sur la cote du Hampshire, en Angleterre. Bull. Soc. Geol. 

 Fr., Ser. 2, t. ix. p. 191. A measured section of Hordwell freshwater beds 

 with their fossils. Bed 17, about 20 feet thick, is the sand in question. 

 It is described as sand of a variable colour, greyish-green where it rises 

 from below the sea-level, but becoming lighter westward, so that beyond 

 Long Mead End it is pale yellow with ferruginous bands and grey spots, 

 p. 202. The first five feet are said to be full of shells but not disposed 

 in lines ; but the thickness over which fossils extend diminishes, so that 

 after a time fossils disappear. Remains of Lamna, Jlyliobates, jEtobates 

 are mentioned ; but the Crocodile, Trionyx, Potamomya, come from the 

 bed in contact with it above, and which is the bottom bed of the fresh- 

 water formation. 



1852. ] T. Wright. A Stratigraphical Account of the Section 

 from Round Tower Point to Alum Bay on the N. W. coast of the Isle 

 of Wight. Proc. Cotsw. Club, i. p. 87, and Ann. Mag. Nat. Hist, Ser. 2, 

 vii. p. 14. These sands in the Isle of Wight, at Headon Hill, are 

 mentioned as containing "fragments of shells too minute and water- 

 worn to ascertain to what genus they belonged " [p. 98]. They are said 

 [p. 99] to be probably of estuary origin. The equivalent bed at Beacon 

 Cliff containing estuary and marine genera, together with the bones of 

 turtles and teeth of sharks. 



1852. T. Wright. A Stratigraphical Account of the Section of 

 Hordwell, Beacon and Barton Cliffs, on the coast of Hampshire. Proc. 

 Cotsio. Club, I. p. 120. The Hordwell freshwater and "upper marine" 



