Historical and Type Collections. 147 



together with all his original drawings, his numerous books OAIIEIY 

 and pamphlets, were bequeathed by him to the British Museum ^^ 

 through his son William Davidson, Esq., February, 1886. By J^^' 

 his direction the entire collection of recent and fossil species is 18-15. 

 to be kept together in one series for the convenience of reference 

 of all men of science who may wish to consult the same. 



The Stratigraphical Collection of British sedimentary rocks 

 (arranged and illustrated by Eobert Etheridge, E.R.S. L. & E., 

 F.G.S.) occupies Wall -cases 1-5, along the western side of 

 Gallery XI, and is illustrated by a continuous section (placed at the 

 top of the case) showing the succession of the sedimentary deposits 

 from the newest in the East to the oldest on the West coast ; also 

 by numerous small sections of the strata, observed and recorded 

 by the Geological Surveyors and others, in different parts of 

 England ; and by a series of small maps, coloured to show the 

 exposed area of each geological formation, and placed next the 

 case containing the specimens which illustrate that formation. 



Two fine examples of "pot-stones," or Paramoudras, are Para- 

 exhibited between Wall-cases 1 and 2. These curious masses of ™**^ 

 flint are from the Upper Chalk of Horstead, Norfolk, and were 

 presented by the late John Gunn, Esq., E.G.S. 



Between Wall-cases 3 and 4 are exhibited — (1) a core of J^ew Specimeni 

 Red Sandstone obtained from the depth of 1,190 feet from the j^^^^ 

 Newent boring for water, to supply the city of Gloucester ; Boring*. 

 presented by E. Eead, Esq., C.E. (2) A series of cores from the 

 Dover boring for coal: that from 2,039 feet representing true 

 coal, that from 2,088 feet being made up of coal and grey grit, 

 that from 1,262 feet being grey grit and sandstone; presented 

 by Erancis Brady, Esq., Memb. Inst. C.E. , E.G.S. 



Between Wall-cases 4 and 5 is placed an example of Wenlock 

 Shale obtained from the Ware boring, Hertfordshire, at a depth 

 of 825 feet from the surface, by the New Eiver Water Company 

 in attempting to procure water for London. 



Between Wall-cases 6 and 7 are placed two large cores of 

 Carboniferous Limestone from the Spinney boring, Northampton ; 

 they were obtained at a depth of 805 feet and 828 feet respectively 

 from the surface, and were presented by John Eunson, Esq., C.E., 

 F.G.S. 



