360 A. J. Juices Browne — On the Tipper Greensand, etc. 
I will now give Dr. Barrens’ interpretations of the sections in 
the three areas we have been cliiefly concerned with, viz. the 
Weald, the Isle of Wight, and the Western area. In the Isle of 
Wight, at St. Lawrence, he gives the following : — 
Zone I. Amm. inflatus. Feet 
A. Micaceous and Glauconitic sands, with bluish argillaceous 
bands at tbe bottom 105 
B. Yellowish sandstone, witb bard siliceous bands 12 
Zone II. Pecten asper . 
{ C. Greensand witb phospbate nodules 6 
D. Bands of green sandstone and bluisb chert 24 
E. Chloritic Marl 7 
A certain similarity will be noticed between this section and those 
previously given, all of them being capable of a natural division 
into two unequal portions, to the upper of which all unite in giving 
a thickness of 30 to 36 feet. Moreover, the lists given by Dr. 
Barrois front these two divisions, in the Isle of Wight and the 
neighbouring county of Dorset, show that they contain two different 
groups of fossils, the one of which corresponds with that found in 
the Upper Gault and Blackdown beds, while the other resembles 
the Warminster fauna. In Surrey (p. 141), he looks upon the 
lower’ soft sandstones and raarls as belonging to the zone of 
Am. inflatus, and upon the Firestone as representing the zone of 
P. asper. In Hampshire he gives an account of the beds near 
Petersfield (p. 36), and thus describes them — 
Feet 
1. Soft, micaceous sandv beds, with Am. inflatus 75 
2. Coarse quartzose sands and sandstones 15 
3. Marly bed with glauconite and nodules of pbosphate of 
lime (no fossils seen) 3 
The second he refers to the Warminster beds or Pecten asper zone, 
and the last he assimilates to the Chloritic Marl ; remarkiug “ that 
these two horizons have not before been identified in this part of 
Hampshire.” He also mentions a road section near Binstead, where 
a similar nodule bed is seen resting on coarse greensands, which he 
considers to represent the Pecten asper zone ; he does not give any 
very definite opinion regarding the position of the Malm-rock, but 
he does not seem to distinguish it from Firestone. 
The Superposition of the Warminster beds to those of the Black- 
down or Amm. inflatus zone is stated to be visible in the vales of 
Warminster and Pewsey, even if it had not been so clearly iudicated 
by Mr. Meyer in Devonshire. 
He adopts Mr. Meyer’s account of the series of beds exbibited 
near Beer Head as giving an accurate description of the different 
horizons, but differs from him in the correlation of the several 
groups ; admitting the existence of a Blackdown fauna (belonging 
to Etage A) in the beds numbered 2 and 3, he does not thiuk that 
Nos. 4, 5 and 6 are sufficiently different to be separated from the 
lower beds, and as they contain large Pecten 4 -costatus and Ex. 
conica, he refers them to Etage B of the same division or zone (see 
ante). No. 7 he considers to be a pebble bed separating the two 
divisions, and he gives to the lower or Am. inflatus zone a thickness 
