781 
A mile distant Mr. Brodie procured from a bed of limestone, about 
five inches thick, Cyclades, Isopods, and a small fish of the Species 
which occurs at Dallards; and in a bed of clay, bones of a tortoise. 
The hard crystalline limestone of the Lady-down beds are noticed 
as yielding, butrarely, Cyclades and Cyprides. In the neighbourhood 
of Tisbury, in a soft, gritty, slightly oolitic stone, the author found 
Tsopods of a larger size than elsewhere, likewise an elytron of u cole- 
opterous insect. Though the number of beds of limestone vary in 
different parts of the Vale of Wardour, yet Isopods and insects ‘cha- 
racterise the whole of them; and as respects lithological characters, 
notwithstanding the great varieties which occur at different localities, 
there is throughout the district that general peculiarity of aspect which 
is so remarkable in freshwater formations of very different ages, and 
which serves to identify detached quarries with each other. 
Vale of Aylesbury.—In Buckinghamshire the Wealden beds possess 
a certain similarity with those in Wiltshire, but with clearly marked 
local differences. At Quainton Hill Mr. Brodie could not discover 
any traces of fishes, insects, or Isopods. In a quarry near the village 
of Stone he obtained the following section :— 
1. Rubble, several feet. 
2. Hard white stone, no fossils ........ Lsvbiboaalth: 2 to 3 feet, 
3. Greenish stone, with Cypris......e0es..0008 2 feet. 
4. Black clay, containing bones of a Tortoise ...... 1 foot. 
5. White and blue limestone (Pendle), yielding Modiol in abun- 
dance ; also a few Cypris and Cyclas; likewise bones and _ palates 
of fishes, coprolites, and, but rarely, remains of insects; fragments 
of carbonized wood are common; and Mr. Brodie obtained a speci- 
men of Sphenopteris Mantelli, and another minute but beautiful species 
of Fern. This limestone bears a close resemblance to one of the 
beds at Dallards. | 
In his general observations on the fossils from these different_loca- 
lities, the author states, that though he has greatly added to the num- 
ber and variety of insect-remains since his former communication, yet 
he has not found any of the larger kinds, almost every specimen re- 
quiring a high magnifying power to be seen distinctly. Next to the 
Coleoptera, the most prevalent orders are the Homoptera and Tri- 
coptera; and Mr. Brodie observes, that this fact accords with the 
habits ef the two latter orders, the first living on plants, remains 
of which are found abundantly in the Wealden, and the second 
hovering over the surface of streams. From the fragmentary state 
of these remains, and from the wings never being expanded in the 
more nearly perfect specimens, he considers it probable, that they 
were carried for some distance down the streams which flowed. into 
the Wealden estuaries. A few of the insects which have been exa- 
mined hy an eminent entomologist, have been pronounced to possess, 
with ene exception, a decidedly European character, to differ from 
those at Aix, and to be less tropical than those found at Stonesfield. 
Since the reading of his prior communication, Mr. Brodie has ob- 
tained Isopods.an inch and a half in length and an inch broad. These 
