118 
THE GEOLOGIST. 
found iu the quarries has come before me, I have been able to secure 
the most important, and to take such notes of the others as would be 
of interest. 
Trimpley is evidently connected in its physical elevation with the 
great upthrow of Palteozoic strata, along the line of which lie the 
Abberley and Malvern ranges. Of this ridge-line it would seem to be 
the northern limit. No true Silurian bed, however, is exposed along 
the strike of its anticline ; but as t!ie lowest measures of the Upper 
Tilestones, which form its backbone, are the exact equivalents of those 
resting against the north end of the Abberley Hill, micaceous shales, 
but fifty feet removed from Aymcstry limestone, we can assume their 
presence not far beneath the axial line of the hill. 
The ridge is flanked with true Old Red Cornstones, containing 
Pteraspis Llotjdii, and P. Lewisii, Cej>halaspis Lijellii, and defensive 
spines of Ctenacanthus or a related species. These fish-remains are 
coloured blue and purple by phosphate of iron, and glisten like 
enamel. Beneath these beds, somewhat unconformably, lie the Tile- 
stones. Lithologically, they arc grey flagstones, interstratified with 
bands of brashy cornstone (this, as far as I can yet learn, is a feature 
peculiar to the Trimpley beds). Fish and crustacean remains occur 
equally in both flagstones and cornstones, but the plant-remains form 
bands of themselves, intermediate between them. Beneath these lie 
micaceous shales, having surfaces bearing tidal ripple-markings and 
hollows. In the sheltered parts of tliese I have found Pterygotean 
ova {Parlca deciinens) and a few drifted plants, but no fish or crus- 
tacean remains. These beds, at Abberley, cover up sandy grits, at 
the base of which I detected the Downton plant-beds, which contain 
the earliest land-plants. 
To return to tlie Upper Tilestones : the fish-remains I have 
met with are these, — Cephalaspis Lijellii, heads only, but in very fine 
preservation; Pteraspis Lloydii, P. Banksii, P. Lewisii, and P. rostratus. 
Fragmentary reinains are very abundant, but good and well-defined 
shields (I know not what else to call them) are rarely met with. The 
triplex character of the plates composing these defensive bony shells 
are beautifully preserved in nearly every specimen I have seen. 
I believe the Kington Pteraspides are remarkable for the want of 
these ornamental layers. Ctenacanthus (?) spines, and fragments of 
