of Barrow in Leicestershire. 141 
At Wilmcote in Warwickshire there are indications of nu- 
merous faults (which were lately pointed out to me by Mr. 
Kershaw), in all directions round the district, more than are 
generally supposed. Thus the ‘firestone,’ which is the lowest 
and hardest stratum worked, crops-out at various points and 
dips at a considerable angle, on the higher ground; and the 
several bands of ‘Insect limestone’ and shale lie in a basin 
formed by the outcrop of this lower bed. The ‘ Plagiostoma- 
bed,’ containing P. gigantea, Cardinia ovalis, and Astarte lurida, 
occurs in places in its normal position ; but there appears to be 
no trace of the underlying Saurian beds, which are of consider- 
able thickness in Gloucestershire, and their absence is to be 
noted both at Wilmcote and Barrow, which implies a great 
thinning-out of the lower Lias in that direction. This holds 
good, at all events, with respect to the lower Lias at the latter 
place, where there are fewer bands of ‘ Insect limestone;’ but at 
the former they are more numerous, not less than eight courses 
divided by thick shale ; and as the ‘ Insect-bed’ in Gloucestershire 
is often confined to one, or at most two layers, only a few inches 
thick, the increased number of ‘ Insect-beds’ in Warwickshire 
may represent the ‘ Saurian beds’ in Gloucestershire and other 
places, with which they were perhaps coeval in point of time. 
The ‘firestone’ above referred to is a hard, crystalline lime- 
stone, full of oysters and spines of Echini, from 3 to 7 inches 
thick. In Warwickshire it always underlies the last bed of 
‘Insect limestone,’ but does not occur in Leicestershire. 
I have only seen two specimens of the large Eryon from Warwickshire, 
one of which is in my own collection, and the other in that of my friend 
Mr. Kershaw. I am indebted to his kindness for another fine but appa- 
rently distinct species of this genus. 
The largest measures 6 inches in length from the top of the head to the 
extremity of the tail, and a little more than 2 inches in breadth in the 
widest portion of the body. 
