187 



Course of mine, 3 in. Rock vein (mine), 4 in- 



BydyUog coal, 3. Chance pins (mine), 2 in. 



Little pins (ore), 4 in. Red vein (mine), 7 in. 



Gloin goch bach coal, i ft. 9 in. Spotted pins (mine), 3 in. 



Yard coal, 3 ft. 3 in. Yellow vein pin (mine), 3 in. 



Small pins (mine), 3 in. Yellow vein (mine), 4 in. 



Coal, 9 in. Big vein coal, i ft. 



Allowing for difference of names, especially in the courses of mine, we have 

 pretty well the same thickness and order in the two places. 



The EUed vein of coal is worked on the hill between Nantyglo and Beaufort, 

 from above ground, the appearance of which, I dare say, everybody who was 

 present will remember, as it was the only " patch " (locally so termed) that we 

 visited on our way back to Brynmawr. We observed from above downwards, 

 the top clay and sandstones, succeeded by large baUs of ironstone, in tolerably 

 regular layers, which, when broken, present beautiful Uttle quartz crystals (termed 

 Welsh diamonds), imbedded in the interstices ; below this was a large amount 

 of shale, which, perhaps, contains a more valuable fossil flora in a small space, 

 than any place known. Although in great confusion, yet the beautiful preser- 

 vation of the ferns, coupled with the utter absence of fish and shells, point out at 

 once, that in this case, we cannot account for this growth by any drift theory— 

 but that they grew there is plain ; for, I daresay, the members will remember 

 seeing one or two fossU trees erect, running up through the shale into the iron ore. 



The following is a list of ferns that I have collected, in conjunction with a 

 friend, the Rev. S. Lucas, a FeUow of the Geological Society, whose departure 

 from the county I lamented very much. I must not forget to mention my head 

 gardener, whose knowledge and interest in his vocation has procured me many 

 good specimens. 

 Annularia brevifolia. Pecopteris dilatata. 



Asterophyllites foilosus. >f cistu. 



„ Parkinsoni. „ caudata. 



„ longifolius. „ laciniata. 



Araucaria. .. Mantelli. 



Calamites approximatus. » nervosa. 



„ cannoeformis. » repanda. 



„ Suckovii. » serra. 



Fructification of an Equisetaceous plant. „ Stutgardiensis. 



Hippurites longifolia. ,. urophyUa. 



Knorria imbricata. Pinnularia capillacea. 



Lepidodendron crenatum. Pterophyllum. 



elegans. Sigillaria flexuosa. 



„ minus. ., oculatum. 



I „ Sternbergii. ., pachydenna. 



plumosum. „ reniformis. 



Lepidostrobus. » tesselata. 



