Geological Society of London. 383 



glaciation of the country are furnished, and the remains of Neolithic 

 man are recorded. 



9. "Microzoa from the Phosphatic Chalk of Taplow," By F. 

 Chapman, Esq., F.E.M.S. (Communicated by Prof. T. Rupert Jones, 

 F.K.S., F.G.S.) 



Ninety-eight species and varieties of Foraminifera, and five species 

 and varieties of Ostracoda have been found in this deposit. All the 

 forms of Ostracoda have been previously found in the Chalk. Of the 

 98 varieties of Foraminifera five appear to be new, w^hilst altogether 

 thirty are new to the Chalk fauna. 



The following new forms are described : — Nnbecularia Jonesinna, 

 Textularia decurrens, T. serrata, Bidimina trigona, and Bolivina 

 strigillatn. 



10. " On the Basalts and Andesites of Devonshire, known as 

 Felspathic Traps." By Bernard Hobson, Esq., M.Sc, F.G.S. 



The evidence in favour of the contemporaneous (non-intrusive) 

 character of these Permian (or Triassic) lavas is discussed, and the 

 improbability of the former existence of felspathic traps in the area 

 of the Dartmoor granite, as suggested by Mr. R. N. Worth, is shown. 

 The macroscopical and microscopical characters of the rocks are 

 described. The great majority of the rocks examined are olivine- 

 basalts, though mica-augite-andesite occurs at Killerton, near Exeter. 

 The presence of quartz-inclusions in the rocks of West Town, 

 Knowle, etc., near Exeter, is shown to have misled De la Beche 

 into terming these rocks quartz- (' quartziferous ') porphyries. The 

 veins in the traps, mentioned by Mr. Vicary, and regarded by some 

 authors as intrusive felsite dykes, are found to be red-stained veins 

 of calcite and sandstone. 



11. " Notes on Recent Borings for Salt and Coal in the Tees Salt- 

 District." By Thomas Tate, Esq., F.G.S. 



The Tees Salt industry has expanded considerably since Mr. E. 

 Wilson's exhaustive paper was read in June, 1888. 



The results of subsequent borings have in most cases simply con- 

 firmed previously ascertained facts, but the two boreholes with 

 which this paper principally deals, put down on the White House 

 estate, three miles due west of Stone Marsh, may be useful in 

 relation to the determination of (a) the area of the Tees Salt-field, 

 and [h) the southern limit of the Durham Coal-basin. 



After boring through 115 feet of Drift deposits and 151 feet of 

 Red Sandstones and Marls, the Saliferous Marls, at the base of 

 which the Salt-rock, when present, is usually found sandwiched 

 between two beds of anh^^drite, were reached, having a thickness of 

 178 feet, but with no Rock-salt. The Magnesian Limestone for- 

 mation, only 299 feet thick, an unusually large propoi'tion of which 

 is gypsum or anhydrite, was succeeded by grey sandstones, rich in 

 calcite, probably due to infiltration. The carbonaceotxs shales and 

 sandstones with bands of encrinital limestone below these, together 

 with their contained fossils, determine their identity with the Yore- 

 dale Series. Total depth, 1079|- feet. 



The chief results are : — (1) the Upper Keuper Red Marls are 



