380 Reports and Proceedings — 



of the rocks and to determine the limits of the divisions of the 

 Upper Cretaceous series. They deny the existence of Lower Green- 

 sand at this locality. 



Of the boring at Cheshunt a more complete account is now given, 

 based on information and specimens supplied by Mr. J. Francis, the 

 Engineer of the New River Company. 



The paper concludes with a tabular view of all the borings in the 

 East of England, showing the level below Ordnance datum at which 

 the Paleozoic floor occurs in each. 



2. "The Bargate Beds of Surrey, and their Microscopic Contents." 

 By Frederick Chapman, Esq,, F.R.M.S. (Communicated by Prof. 

 T. Eupert Jones, F.E.S., F.G.S.) 



This is an attempt to correlate the Bargate Beds of Guildford and 

 its vicinity with the members of the Lower Greensand as known 

 elsewhere in the S.E. of England. 



(1) The strata at Littleton quarry, near Guildford, are described 

 in detail ; the remame fossils. Oolite ironstone, and other material 

 derived from older rocks are noticed ; the abundant occurrence 

 of Ostracoda and Foraminifera in a particular clay-band is noted, 

 and the method adopted for getting them free from the matrix is 

 described. The residuary minerals left from the washed sand of 

 this clay-band, and comprising zircon, rutile, tourmaline, kyanite, 

 quartz, felspar, and glauconite, have been carefully studied and 

 described for the author by Dr. W. F. Hume, F.G.S., who states 

 that the minerals present are of the same size as those from the 

 Bagshot Sands and three times as large as those from the Chalk- 

 marl of the Isle of Wight. The constitution of the compact Bargate 

 Stone, with its sponge-spicules and silicified shell-structures, is 

 described in detail ; and a rare Corallina and numerous arenaceous 

 Foraminifera are noticed. 



(2) The Bargate Series is well shown, along the lane crossing the 

 hill below St. Martha's Chapel at Chilwortb, with its pebbly beds, 

 clay-seams, limestone, and sponge-beds. Dr. Hinde's descriptive 

 notes on the sponge-spicules are given. Some detrital fragments of 

 fossiliferous Oolitic rock described as of Jui-assic age occur in these 

 Neocomian strata, and are comparable with some of the material 

 obtained from the deep boring at Richmond, Surrey, and probably 

 derived from the old Jurassic ridge to which Godwin- Austen 

 formerly made reference. The author has found evidence in this 

 neighbourhood of the Folkestone Sands lying unconformably on the 

 Bargate Beds. 



The clay-beds noticed by Dr. Fitton at Holloway Hill, Godalming, 

 the author refers to the Bargate series. South of Dorking, also, Mr. 

 Chapman found sand and clay of this series on the Horsham Road. 



The Ostracoda and Foraminifera found abundantly in some of the 

 Bargate Beds in Surrey are then described in detail. Of the former 

 there are 20 species and varieties, 7 of which are new ; 9 have been 

 previously described from Cretaceous strata, whilst 4 are Jurassic 

 forms. Of the Foraminifei'a there are 139 species and varieties. 

 Of these, 11 are described for the first time. There are besides 



