570 Correspondence. 
the broadest part of the outer whorl would be some three inches 
across. In the upper part of the fossil bed he found two species of 
Lingula. Lower down, two species, at least, of Chonetes ; some four 
species of Goniatites; one species of Inoceramus? one Pecten; 
Posidonia, one species; Productus, one species; Spirifer Urit; 
Nucula or Ctenodonta, two if not three species ; Aviculopecten, at 
least two species; Acinus carbonarius; Strophomena? Pleurotomaria, 
Orthoceras, and Anthracosia. In the same shales I found a solitary 
fish-tooth. Mr. Ward thinks it is a Cladodus tooth—but if so, the 
base of it is flatter and much broader than any teeth of this fish 
that I have seen. 
But what increases the interest and importance of these beds of 
marine shells, is the fact that a considerable number of the species 
obtained from them are identical with those I obtained a few years 
ago, from a bed of shale in the Farewell Rock series of the South 
Wales Coal-basin. ‘The bed in question crops out in the Llanelly 
valley, a mile or so beneath the town of Brynmawr, and appears to 
occupy a position midway between the lowest seam of coal, and the 
Carboniferous Limestone. Thus the fossils which in Wales are 
found considerably below the lowest bed of coal, are, in North 
Staffordshire, found high up in the lower thick measures. I am 
informed by gentlemen practically acquainted with the district, that 
the lowest seam of coal in this field is at least eight hundred yards 
below the bed containing the above fossils. Tho natural inference 
is—that either the species of shells which I have obtained from the 
two localities of Staffordshire and Wales, had an immense range in 
time—or else that the Coal-measures of North Staffordshire extend 
much lower in the series of Carboniferous rocks than do those of 
Wales. In either case the facts are both instructive and interesting. 
In closing this brief notice, I may just remark, that about forty 
yards beneath the beds referred to by Mr. Molyneux, Mr. Amison 
was fortunate enough to detect another bed containing marine shells, 
but in less numbers than the upper bed, both with regard to species 
and individuals. What is most important, is that all the species which 
we obtained from the lower bed are different from those obtained 
from the upper one, and appear to have been a great deal worn 
before deposited. Among those we found was a very small Nautilus, 
two species of Nucula? one Naticosa, and one that looks like a 
very broad and short Anthracosia, and a small Goniatites. 
Yours truly, S. Lucas. 
Loneron: Oct. 4, 1865. 
ANECDOTE OF STEPHENSON. 
To the Editor of the GrouogicAL MAGAZINE. 
Sir,—As I communicated the anecdote of the late Mr. George 
Stephenson sometime before I observed or paid any attention to the 
rocks of Charnwood Forest, would you allow me to make a correction 
by stating that, though it was formerly customary among miners to 
apply the term granite to all the igneous rocks of Leicestershire, the 
