Geological Society. 229 



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 aud 

 described for the Author by Dr. AV. F. Hume, F.G.S., who states 

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

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

 of the Isle of Wiglit. 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 crossiug the 

 hill below St. Martha's Chapel at Chil worth, 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 Jurassic age occur in these 

 Neocomian strata, and are comparable with some of the material ob- 

 tained from the deep boring at Richmond, Surrey, and probably derived 

 from the old Jurassic ridge to which Godwin- Austen formerlj- made 

 reference. The Author has found evidence in this neigbbourhood 

 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 

 Eoad. 



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 Foraminifera there are 139 species and varieties. 

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

 107 which have hitherto been unrecorded from beds of Neocomian 

 age. The following 10 species and varieties have been known pre- 

 viously only from recent deposits, viz. : — Haplophragmiumfoliaceum, 

 Brady ; Virgidina suldepressa, Brady ; Ehrenhergina pupa (d'Orb.) ; 

 PolymorpMna sororia, Reuss, var. cmpidata, Brady ; P. oblonga, 

 Will. ; P. regina, Brady, Parker, and Jones ; Discorbina Bertheloti 

 (d'Orb.) ; D. concinna, Brady ; D. Filardeboana (d'Orb.) ; and 

 D. araticana (d'Orb.). The large number of forms new to the 

 Xeocomian fauna is undoubtedly due to the fact that the deposits of 

 the Bargate Series belong almost exclusively to the ' Laminarian ' 

 and ' Coralline ' zones. Taking into consideration the facts that 

 23 per cent, of the forms recorded are almost peculiarly Neocomiaii 

 types, that these added to known Cretaceous and Tertiary species 

 amount to 122, or 87 per cent, (the latter additions probably being 

 due to the circumstance that the Neocomian strata have not been so 

 extensively examined in regard to their rhizopodal fauna as might 

 have been desired), it is extremely probable that the microzoic fauna 

 of the Bargate Series is almost entirely, though not quite (since we 

 have a few Jurassic species present), indigenous to the deposit. 



