SALTER AND AVELINE ON THE CARADOC SANDSTONE. 67 



The fossils are very much the same as those of the two preceding 

 divisions — 



Calymene Blumenbachii, *****, Orthis vespertilio, 



Orthis testudinaria, *********^ Nebulipora favulosa, var. lens, 



alternata, 



being still the common fossils. There is, however, a considerable 

 difference in the proportionate numbers of certain species. The fol- 

 lowing, which are rather rare in the lower beds, are the commonest 

 species here : — 



Phacops conophtKalmus. Gretton, Hatton, &c. 



truncato-caudatus. Acton-Scott plantation, &c, 



Homalonotus bisulcatus. Do., Cheney-Longville. 



Tentaculites annulatus. Do., do. 



Modiolopsis orbicularis. Do., do. 



while the following are but rare in most of the localities : — 



Trinucleus concentricus. Strophomena expansa. 



Bellerophon bilobatus. Glyptocrinus "basalis. 



Orthis flabellulum. 



The last, indeed, so common in division No. 2, is seldom or never 

 met with here. One rare and curious fossil was detected near Cheney- 

 Longville, which may serve still more to identify these beds with 

 those of the Bala rocks, — the Pterotheca undulata, Salter, a curious 

 and rather large Pteropodous shell found in strata of this age in Caer- 

 narvonshire. At Acton Scott, in the quarry near the church, Cybele 

 verrucosa and Lichas laxatus occur, together with Strophomena de- 

 pressa, Leptcena transversalis, and Orthis hiforata ; and at Gretton 

 quarry near Cardington, a trilobed Illcenus and Acidaspis Caractaci, 

 with fucoids, are found, in addition to almost all the common Bala 

 fossils. This locality is well worth the attention of collectors. 



The topmost bed of these flags is a dark grey shale, calcareous and 

 rubbly, with bands of concretionary limestone frequently occurring in 

 the micaceous shale. It is well seen in the river Onny at Cheney-Long- 

 ville, where it forms a small ledge easily accessible when the water is 

 low, and plainly dips under the shales next described. It also comes 

 out in the Horderley-road, where it is full of fossils ; and is still better 

 seen by following up the little brook called Batch Gutter, where it 

 has been quarried. The same bed is traceable in the road-side between 

 Acton Scott and Henley, in the brook above Ticklerton Hall, and even 

 ranges as far up as Plash, north of Cardington, where a well lately 

 sunk has brought up abundance of this peculiar shale ; and in the 

 brook above Church Preen, yellow-brown shales occur with some of 

 the same fossils. It is then overlapped by the coarse grits belonging 

 to the overlying series, and disappears. The fossils are very plen- 

 tiful. The following are characteristic : — 



Lichas laxatus. Strophomena bipartita, **. (Appen- 



Phacops truncato-caudatus. dix.) 



conophthalmus. Clidophorus , oval sp., **. 



Ampyx sp. Nucula varicosa, Salter (Appendix). 



Orthis Actoniae. Orbicula elongata, Portlock, **. 



vespertilio, **. Scalites (Pleurotomana) lenticula- 



elegantula. vis, ***. 



f2 



