Vol. 52.] OX THE UPPER PORTION OF DUNDRY HILL. 071 



The correlation of the ragstone and its position above the building- 

 stone are practically all that we agree with in this comparison 

 (see Table VI., facing p. 704). 



In 1859 Wright ' gave an account of the Inferior Oolite, and in 

 his paper published certain ' Notes on Dundry Hill, by II. Etheridge ' 

 (op. cit. p. 21) This communication is practically a subsidiary paper 

 by the latter author, and the chief matter of interest in it is the 

 sequence of the strata, which was given in the following terms : — 



Feet. 



7. Building-stone or Freestone beds .: 12 



6. Fine-grained oolite 4 



5. Bagstones (shells) 8 



3 & 4. Bubbly Limestones (shells) 12 



2. Ammonite-bed \ r 



1. Tronshot shelly bed J 



a. Upper Lias Sands.. 2 



b. Lower Lias 500 



We would notice, in regard to this section, the following points : — 



1. That no Middle Lias is mentioned, and on this subject Mr. 

 Etheridge is very emphatic, saying (p. 22), ' In this fine develop- 

 ment there are no traces whatever of the Middle Lias or Marhtone 

 as exhibited in the Bath district, and in the Cotteswold Range 

 generally.' (The italics are his.) 



2. The Upper Lias sands are stated to be 2 feet in thickness ; 

 1 they pass downwards into the clays and shales of the Lias 

 beneath.' They are said to underlie a shelly bed which, together 

 with the Ammonite-bed, is 5 feet in thickness. From the list of 

 fossils given it would seem that the ' Ammonite-bed ' is what we 

 shall presently call ' the Ironshot Oolite ' ; but we are quite unaware 

 of any sands within 5 feet of this bed ; and in fact we have failed to 

 find any truly sandy strata anywhere in the Dundry range. About 

 the position indicated, and particularly at the western end of the hill 

 — the locality mentioned by the author, — we find sandy limestone 

 and marl, and this is probably the horizon referred to ' Upper Lias 

 Sands ' by Mr. Etheridge ; but these strata yield Terebratula Eudesi, 

 Oppel, and T. cortonensis, S. Buckman, indicative of a much later 

 date. (See Table V., p. 699.) 



In regard to the other beds we would make the following remarks, 

 taking them in order : — 



' No. 1.' From the description given this is evidently the series 

 of beds at the base of what we call ' the Ironshot Ooiite ' ; but it 

 is said to lie ' immediately upon the zone of semi-indurated sands.' 

 In the list of fossils given are Cirrus Leachi and C. nodosus, which 

 would be found in strata occupying such a position directly above 

 the sands ; but they are not to be obtained from the beds imme- 

 diately below the Ironshot. The explanation is that two beds at 

 different horizons have been confounded — one, the basement-bed at 

 Backlcdown, the other, the infra-ironshot bed in the northern road- 



1 'On the Subdivisions of the Inferior Oolite in the South of England, 

 etc.,' Quart. Journ. Geol. Soc. vol. xvi. (18G0) pp. 5-48. 



