4 ROSS DISTRICT. 



nnd local species confined to it, but in addition to these specialities, 

 it produces a larger number of the remaining species, in the county 

 list than does any other rock. It must, however, be owned that this 

 last remark is made from memory, and has not yet been strictly tested 

 by the formation and comparison of distinct catalogues of the plants 

 of the diHereut geological formations. 



GEOLOGY. — The south and south-eastern portions of the Ross 

 district as above described, include the hills of Great and Little 

 Doward, as well as Howie Hill j all of which consist of strata of 

 the Carboniferous epoch. 



On the banks of the Wye, opposite Whitchurch and below 

 Symonds's Yat, there is a section which shews the transition from 

 the upper beds of the Old Eed sandstone, the conglomerate or pud- 

 ding-stone, and the yellow sandstone, to the overlying carboniferous 

 limestone shale, and carboniferous or mountain limestone. 



The upper part of the section is much obscured, but may be traced 

 by the yellow sands which crop out on ascending from the Wye 

 ferry to the rocks of Symonds's Yat. 



I recommend my brother geologists to examine a far superior 

 devclopement of the transition rocks between the Old Eed and 

 Carboniferous systems at Drybrook, on the Eoss and Drybrook road, 

 and of which I have given the particulars in a former work.'"' 



I rejoice that Howie Hill falls within the district of the Hereford- 

 shire Flora, for a band of the lower conl measures still remains 

 there, a relic, as it were, to remind the botanist of the most profuse 

 vegetation the world has ever beheld. 



Ascending to Howie Green, and Howie Hill, from Eoss, the ex- 

 plorer passes successively over the upper beds of the Old Eed sand- 

 stone, the mountain limestone shale and limestone, the millstone 

 (ait, and lower coal measures. The following may be taken as the 

 arrangement of the strata in passing from the Speech-house in Dean 

 Torest, to the rocks of Eoss. 



1. Upper sandstone and clays Avith various coal seams, lower 

 sandstone and lower coal seams. 



2. Millstone grit. 



* Stones of tiic Valley. 



