186 PROCEEDINGS COTTESWOLD CLUB 1903 
to recognise Eskdale (Lake District) granite, which in 
Shropshire occurs in large boulders. Omitting a few 
varieties which I could not, with certainty, determine, the 
remainder were well known Archean types, and came 
from the Wrekin chain of hills, so that at the furthest they 
would not have to travel more than five miles to reach 
the Severn. They were (1) red binary granite, (2) a 
conglomeratic ash containing derived fragments of the 
granite, (3) a dark-green, fine-grained, ash, (4) purple 
felsite (Ercal type), and (5) purple rhyolite with flow- 
structure (Wrekin type). It is highly probable that much 
of the sand also came from Shropshire ; for at Shrewsbury, 
thick deposits of red sand, with some gravel, lie just above 
the banks of the river. At Buildwas, similar deposits 
occur on both sides of the Severn, and, according to Mr 
G. Maw, gravels are found 7 feet below the level of the 
surface of the river. In the gravels at Shrewsbury, Mr 
G. Luff detected Cyprina Islandica, Cardium edule, and 
a Turritella. Mr Maw collected in the Buildwas gravels, 
amongst other species, Anomia ephippium, Ostrea edulis, 
Cardium edule, Cyprina Tslandica, Astarte boreals, 
Purpura lapillus, Murex erinaceus, and Turritella terebra. 
According to our authorities, all the species I have quoted 
from Shrewsbury and Buildwas have been found in the 
gravels near Worcester. 
To remove any uncertainty attending the identification 
of some of the species, I have studied the collection 
of Drift fossils in the Worcester Museum. The only 
marine mollusca now to be identified are Cardium edule, 
Cyprina Islandica, Purpura lapillus, and Turritella 
terebra, all of them amongst the most common species in 
the Salopian Drift. These specimens, except the Purpura, 
which is a very strong shell, are in fragments and much 
water-worn, and Purpura itself is water-worn. On the 
other hand, the tooth of Rhznoceros tichorhinus found in 
