274 



PEOFS. LLOYD MORGAN AND REYNOLDS ON THE [Aug. I9OI, 



In the bed of the stream, both here and higher up, are weathered 

 fragments of a band which we have not found in situ, but which 

 from the mode of occurrence of the fragments must come from a 

 horizon below the trap. The following suite of fossils, identified by 

 Mr. Eeed, indicates Upper Llandovery age : — 



Pentamerus sp. 



Orthis sp, 



0. elegantula, Dalm. 



Ehynchonella ( Wilsonia) Wilsoni (Ij 



Sow. 

 Meristella angusUfrons, M'Ooy. 

 Favosiies gothlandica, Fougt. 

 F. Forbesi, M.-Edw. 

 F. sp. 



Coelospira hemispharica, Sow. 

 Aulopora serpens, Linn. 

 Lindstroemia hina, Lonsd. 

 L. suhdupUcata, M'Coy. 

 Crinoid-remains. 



Thacops Weaveri, Salt. 

 Ckeiruncs himucronatus, Murch. 

 Encrinurus punctatus, Briinn. 

 Calymene Bluonenbachi, Brongn. 

 Lichas sp. (hypostome). 

 Cornulites serpularius, Schloth. 

 Horiostoma globosum {— sczUptuon, 



Sow.). 

 Vleurotomaria sp. 

 Orthonota sp. 

 Atrypa reticularis, Linn. 

 Spirifer crispus, His. 

 Sp. elevatus (1) Dalm, 

 Stropheodonta cornpressa, Sow. 

 LeptcBna rhomboidalis, Wilck. 



We have said that 60 paces within the wood the trap occurs, 

 underlying the Wenlock limestones and sandstones. All the 

 exposures for a considerable distance along the bed of the streamlet 

 show igneous rock, which also crops out in the slopes to the north 

 of it, and is continuous with that already spoken of as running 

 along the western border of the field (shown on the 6-inch 

 Ordnance Map) as almost encircled by parts of the wood. Unfor- 

 tunately, as the stream is traced up farther east, there is but scanty 

 and inconclusive evidence of the nature and disposition of the strata. 

 After a gap, in which the banks at present show only recent stream- 

 wash, the trap is again exposed for a short distance ; and yet farther 

 east, just within the wood on its eastern side, sandy beds occur 

 dipping 55° south 15° east, that is to say, in a direction nearly 

 opposite to that which is found on the other side of the trap- 

 exposures near the western border of the wood. Without further 

 evidence than is at present obtainable it is difficult to interpret the 

 disposition of the strata. There may be faulting; but, on the 

 whole, we are inclined to believe that here is a local anticline on 

 each side of which the Wenlock Beds occur, the underlying arch of 

 trap being so denuded as to bring in Upper Llandovery Beds, not 

 seen in situ, though they aflford the weathered fragments obtained 

 from the bed of the stream. These occur only in that part of 

 the stream-bed which lies below the point where we conjecture the 

 crown of the denuded anticlinal arch to lie. 'None were found 

 higher up the stream, farther east. 



The occurrence of such an anticline (see fig. 1, p. 273) would 

 serve to explain the broadening out of the trap at the surface, in 

 the hog's-back of the field of which we have spoken as surrounded 

 by parts of Daniel's Wood. 



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