AN^NITEKS.VRY ADDRESS OF THE PRESIDENT. XXXVll 



mian beds of Yorkshire and Lincolnshire, and shows their relation 

 to those of Hanover, "Westphalia, and Brunswick. The Speeton- 

 elay series he considers to be the keystone in the correlation of the 

 beds over the whole area. 



In a subsequent paper Mr. Judd gave an interesting account of a 

 series of beds between the Neocomian and Wealden strata of the 

 south coast. The section where they were first noticed some years 

 since by Mr. Godwin- Austen and Prof. E. Porbes is at Punfield, in 

 the Isle of Purbeck, whence Mr. Judd suggests the name of " Punfield 

 Formation " for these beds, which he shows to be of considerable im- 

 portance, having a wide range through Prance, and being closely 

 related to the coal-bearing strata of the north of Spain described 

 by M. de Yerneuil. The fossils are mixed and of a peculiar type ; 

 and there are many species common to the English and Spanish 

 series. 



Mr. S. Sharp subdivides the Oolites of the Northampton district, 

 and shows that the line of division between the Great and the In- 

 ferior Oolites in the neighbourhood of Northampton is marked by 

 unconformity as well as by organic remains. He states that there are 

 four areas, within a comparatively small space, in which the whole 

 of the beds occurring in each, from the Great Oolite down to the 

 Upper Lias inclusive, are accessible. The Northampton Sands he 

 proposes to class in three divisions — the Upper, Middle, and Lower. 

 Though the beds vary considerably in thickness, according to the 

 different localities, the total thickness of the Northampton Sands 

 may be taken on an average as about 80 feet. 



Mr. Mitchell suggests that the valleys of the Oolitic district round 

 Bath are due not so much to denudation as to the circumstance that 

 many of the beds of Great Oolite are old coral-reefs of limited ex- 

 tent, while the argillaceous strata are true sedimentary deposits 

 overlying and wrapping round them, so that the Oolitic beds never 

 in fact extended across the present vaUeys, though the clay beds did. 



Mr. R. Tate continues his researches on the fossils of the different 

 divisions of the Lias in Gloucestershire, and shows the value of the 

 Ammonite-zones over certain areas — also that although the condi- 

 tions of depth and deposit of the upper part of the Lower Lias are 

 repeated in the lower part of the Middle Lias, there is a total change 

 in the fauna, whence he infers a break in the stratigraphical suc- 

 cession. 



Prof. Bamsay states, in an interesting paper " On the physical 

 Eelations of the New Bed Marl, Bhsetic Beds, and Lower Lias," that 



