Yol. 52.] ON THE UPPER PORTION OF DUNDRY HILL. 675 



Dundry Hill, to correlate its beds with Dorset. He then recognized 

 that strata were deposited at Dundry during the Sauzei, WitchellicB, 

 discitce, and concavi hem eras, and that ' the Ironshot Oolite,' in a 

 restricted sense, was laid down during the first-named hemera — the 

 latest in point of time. He corrects the supposition that the ' Iron- 

 shot ' was contemporaneous with the ' Ironshot ' of Sherborne ; and 

 notes the absence of any strata deposited during the Humphriesiani 

 and niortensis hemerae. 



In 1894 H. B. Woodward furnished a short account of the 

 Dundry beds in his Survey memoir, 1 but he made only the following 

 divisions : — 



Building or Freestone Beds. 1 „ c . ., D 7 . 



r, .. ° > Zone ot Ammonites Farkmsoni. 



Kagstones. J 



Ironshot Limestones. 1 Zones of Amm. Humphriesianus 



Midford Sands. J and Murchisonoe. 



No attempt is made to separate the Ironshot limestones, or to 

 distinguish the fossils of the ' Humphriesianus ' and ' Murchisonce ' 

 zones. 



We have given this short summary of the most important notices 

 which have been published concerning the Dundry beds, in order to 

 show what has been accomplished in the interpretation of its 

 deposits. It now remains for us to give an account of our own 

 work. 



Our first joint visit to Dundry Hill was made in the autumn of 

 1887, when our observations showed the desirability of a more 

 detailed account and more accurate correlation of the Dundry 

 strata. Since then we have, together or separately, paid many visits 

 to the hill ; we have resided there at different times, and, when 

 we found that the geological structure of certain parts of the hill 

 could not be discovered in any other way, we employed quarrymen 

 to make special excavations. We owe our best thanks to Sir 

 Greville Smyth, Bart., and to J. H. Shorland, Esq., for their 

 courteous permission to make the necessary excavations upon 

 their property ; and we are also indebted to their tenants for kind 

 assistance in this matter. Had it not been for these excavations 

 and the information thus obtained, our work would have been very 

 imperfect. Even now it is far from having that completeness 

 which we would desire ; and, before such completeness can be 

 obtained, very much more in the way of excavation will have to 

 be done. However, the results which we have obtained are, we 

 hope, of sufficient value to justify the placing of the present com- 

 munication before the Society. 



1 Mem. Geol. Surv. ' The Lower Oolitic Rocks of England,' in ' The Jurassic 

 Rocks of Britain,' vol. iv. (1894) p. 99. 



