108 
THE GEOLOGIST, 
may be advantageously made at every quarry. The Sutton quariy is 
well worth staying at, for here the head-plates of Pteraspis are of frequent 
occun-ence, and are much better preserved than elsewhere, phosphate 
of iron having coloured them blue and purple, and chemically fixed 
the outer striated layer of shell — so seldom found in position — to the 
internal cancellated and filmy ones. At Bouldon too, in the quarry 
near the mill, Pteraspis is not unfrequent; but the cornstone is 
coarser, made up of larger and more angnilar pebbles, and the fossils 
have suffered many breakages from being laid in their company. On 
the opposite side of the dale, good Pteraspides have, I believe, been 
found at Norton, a small village nearly opposite to Hayton ; and if 
we tm^n eastward from that point, and skirt the foot of the Titterstone 
Hill, we shall get some specimens of much interest from a quarry 
near Farlow. Indeed, the finest specimen of P. rostratus I ever saw, 
came from a sandstone rock occurring with cornstones, near the 
forge in that village. 
There is another good exposure of fish-bearing Old Red which has 
had scant justice done to it — the beautiful country lying north of Brom- 
yard. AtHinston and Acton Beauchamp, near this tow'n, CejjJialaspis 
Salweyi has been met with. This is a large species, having its enamel 
layer covered with "pearly drop-like tubercles" of small size, which, 
together with its other distinct characteristics of shape and ornamen- 
tation are described by Mr, Harley, in the Quart. Journ. Geol. Soc, 
vol. XV., p. 504. 
I think it Hkely that the Upper Cornstones occur near Tedstone 
Delamere, though I have been unable to verify this by a visit. This 
hard brecciated band is w^ell worth searching for, as it contains in 
the two openings made into it, of which I am aware, that very beau- 
tiful species, Ceplialaspis asterolejns — the monarch, by vii'tue of size 
and ornamentation, of the " Buckler-heads." A short memoir is 
given by Mr. Harley, in the Quart. Journ. Geol. Soc, vol. xv., p. 
503, which, as we learn from a note appended, will be incoi^orated 
with the description of Cephalaspides to be published by the Geological 
Survey. The outer surface of the head-shield possessed by this regal 
fish is ornamented by tubercles, variable in size, but larger than those 
of G. Sahueyi. But the most wonderful structure is that of the inner 
plate — borrowing the words of Mr. Harley — " It presents lacunae and 
long branching canahculi precisely resembling those of human bone. 
Many of these are completely injected with a transparent blood-red 
material ; and so beautifolly are they thus displayed, that one ig-norant 
of the structure of bone would be able to apprehend it by a glance at 
a minute part of this ancient fragment. So wonderfully indeed has 
nature treasured up her secrets in this disentombed relic of a time 
so distant as to be incalculable, that she distinctly reveals in their 
minutest details the structure of canals rot more than the one fifty- 
thousandth of an inch in diameter, and such as defy the skill of the 
anatomist to inject." Several good specimens of C. asterolejns have 
been ft-om time to time obtained by me from an exposure of the Upper 
Cornstones at Heightington, near Bewdley. But the mine is now 
