462 



THE GEOLOGIST. 



Both these are uew in the red sand of the neighbonrhood.— [Extract of letter 

 from J. E. Lee, Esq., Caerlton, Monmouthshire.] 



ExTRxVCT OF A LETTER moYi A LuDLOw GEOLOGIST. — Dear Sir, — I amnse 

 myself over the fire this evening by writing (with a miserable pen) the results 



of our day's walk. M . and l' went from here this morning to Pedwardine. 



and had the good fortune to find plenty of the Bidyonema sociale. The Lin- 

 gula beds are well shown in the bottom' of the first cross lane from Brampton 



Lingnla Beds. 



a a, Llandovery Beds ; 6, Lower Llandoveiy Beds. 



Brian dipping at about this angle fifty degrees to the west ; and the Llan- 

 dovery beds cover them unconformably, with a gentle dip to the east. The 

 first Llandovery bed is thin — ^two or three inches only — and of a yellow earthy 

 character; the next is a fine conglomerate bed (coarse sand and fine gravel), 

 about five or six inches ; then a thicker earthy yellomsh bed. Above this the 

 rock is mixed up with soil and penetrated by roots, and becomes obscured. 

 Nearly at the east extremity of the Lingula flags there is a crush, twisting the 

 strata' a liltle out of place ; and higher up the lane are seen the massive beds 

 of coarse Llandovery conglomerate, the same that are seen at the bottom of 

 Brampton Brian Park. 



We could find no trace of anything except Dictyonema, unless it be a small 

 round shell, wliich I suppose may be a minute Lingula : it is quite smooth. 

 Of this we found several. The Lingula beds are all thin papery beds of fine 

 smooth silt. 



We t hen ei-osscd over, to try and find another place Avhere M . had 



found l)ii'/i/ni/(',..(i, in the road leading up under Wigmore Rolls to Adiortou, 

 but couUl not iDocl with any. The only beds Ave could see were Weidock 

 Shale, and in i,\'ii(-v;il vci y barren, but in some places containing fragments of 

 irllobitcs, tvc. Aly iViciul declares that he found the very same Bidijoneina 

 here, and in these same Wcnlock beds ; but as the genus is known in strata of 

 tliat iig-c, in America, it is possibly another species. You will be glad to know 

 of its occurrence here in any form. 



Wc have just got from the quarry here a fine specimen of 'Pcdceocrinus ferox 

 showhig the five arms ; the centre is a rotten mass, yet 1 tliiulv it is the best 

 specimen, altogetlicr, I have seen. You know that the Frotaster Wltoni, (as 

 M ell as P, vcrniijonnis,) is found at Tripplcton roadside quarry. We have also 



got from Tripplcton a curious Bn/ozorni form like this, which wc fancy to be 

 something new. It is not unlike an oicri/iifew'iih. several heads on one'stem. 



