310 Geological Society. 
the same sequence of beds, and he believes a similar succession to 
occur around Battle and Hastings. Westward of Tunbridge Wells 
as far as East Grinstead, the same beds occur, but beyond that 
the Weald Clay and Tunbridge Wells Sand alone are exposed; and 
the latter is here divided into upper and lower beds by shale and clay 
(termed ‘“ Grinstead Clay ” by the author), which thicken westward 
to 50 feet and more. It is the ‘‘ Lower Tunbridge Wells Sand” 
that forms natural rocks near Grinstead. Near Horsham the Weald 
Clay contains, at about 120 feet from its base, bands of stone known 
as the ‘‘ Horsham Stone,’’ used for roofing and paving. . 
The author then explained at large the grounds on which he 
proposed to replace Dr. Mantell’s term ‘‘ Horsted Sands” by “ Upper 
Tunbridge Wells Sand,”’ that of ‘‘ Worth Sands” by “ Lower Tun- 
bridge Wells Sand,” and that of ‘“ Tilgate Beds” by ‘‘ Wadhurst 
Clay,”’ and his reason for proposing the name of “ Ashdown ” for 
the next lowest bed of the “‘ Hastings Sand.” 
The paper concluded with a description of some of the chief litho- 
logical characters of the clays and sandstones of the Wealden area 
under notice. 
2. “On the Permian Rocks of the South of Yorkshire; and on 
their Paleontological Relations.’ By J. W. Kirkby, Esq. Com- 
municated by T. Davidson, Esq., F.G.S. 
The author, after defining the area to be treated of, first noticed 
the results of the labours of former observers in this district; and 
then succinctly described the several strata, referring to Professor 
Sedgwick’s Memoir on the Magnesian Limestone for descriptions of. 
the physical geography and very much of the lithological characters 
of the country under notice. The strata treated of Mr. Kirkby re- 
cognizes (in descending order) as, 1. the Bunter Schiefer, about 50 feet 
thick; 2. the Brotherton Beds, 150 feet; 3. the small-grained 
Dolomite, 250 feet; 4. the Lower Limestone, 150 feet; 5. the 
Rothliegendes or Lower Red Sandstone, 100 feet. These were then 
compared and coordinated with the Permian strata of Durham, where 
the three limestone members are thus represented :—1. The Upper 
Limestone by the Yellow, Concretionary, and Crystaline Limestone 
(250 feet) ; 2. The Middle Limestone by the Shell- and Cellular 
Limestone (200 feet); and 3. The Lower Limestone by the Com- 
pact Limestone (200 feet) and the Marl-slate (10 feet),—the over- 
and under-lying sandstones being much alike as to thickness in the 
two areas. 
After some remarks on the probable geographical conditions 
existing in the Permian epoch, the author proceeded to treat of the 
Permian fossils of South Yorkshire in detail. These belong to about 
thirty species, and are nearly all from the Lower Limestone,—three 
species only occurring in the Brotherton beds. With three excep- 
tions they occur also in the several limestones of Durham; five of 
them are found in the lower part of the red marls of Lancashire ; 
and six of them are found at Cultra and ullyconnel in Ireland. 
The distribution of the species in the several beds at different loca- 
