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CHOUgh to find a considerable number of the remains of these Crustacea, and 

 possibly of some other allied forms which may be new, consisting of heads^ 

 body-rings, entire tails, portions of the body of some size, chaws, and swimming- 

 feet, more aumeroiis and on the whole better preserved than any previously 

 detected in England, and for the most part larger than those obtained in the 

 eqvdvalent stratum near Ludlow. Some of the bodies have as many as eight or 

 body-lings attached, but without the head or tail, owing, I believe, in a great 

 meeasure to the difficulty of working the bed, and the consequently small frag- 

 ments which could be got out, even with the greatest care and labour. I am in 

 hopes that the entire collection will be placed in the hands of a competent 

 authority, when the moat remarkable will be duly figured and described. In the 

 same beds at Ludlow remains of these singular Crustacea are numerous, but I 

 am not aware whether they hare been observed in almost equal abundance at 

 Pui-ton. If the quarry was worked I have no doubt some entire specimens 

 might be procured, but unfortunately there is no hope of this, for, although 

 there is a capital band of adjacent sandstone, it is not allowed to be 

 quarried. 



At Lesmahago, in Scotland, where the Silui-ian rocks are much altered and 

 more of a fine slaty character, very perfect specimens of Eurvpteri and Ptcrygoti 

 occur, many of the latter indicating great size. I have two body-rings of this 

 genus of gigantic proportions from the Old Red Sandstone in Scotland much 

 larger than any in the Lesmahago Silurian rocks ; and Mr. Salter has lately 

 obtained some remains of pterygotus in Wales, and especially near PontrUas, 

 from the Old Red Sandstone, which must have been of enormous size. 

 The only way in which we can account for the better jjreservation 

 of these Scotch-Silurian Crustacea arises, no doubt, from their rapid 

 and immediate preservation in the Silurian mud after death, which, 

 as in the Oolite at Solenhofen, in Germany, and in the Lias at Lyme 

 Regis, in Dorset, accounts for their fine condition. These crustaceans, as well 

 as the trilobites, were easily separable after death, and unless instantly embedded 

 would soon decompose and break up and be scattered into fragments by waves 

 and currents ; hence they are so often found in a mutUated state, the heads, 

 tails, and single body-rings being most usually preserved. 



In this short notice my object has been purely Palceontologieal, therefore 

 I wUl not make any remarks on the physical geology of this district, which is, 

 however, most interesting and instructive, being probably the finest example of 

 a valley of elevation in England, and it has been already ably described by 

 Sir R. Murchison, and one of your own members, Mr. Dixon. With tho 

 exception of occasional visits of the Woolhope Club, and a few wandering 

 geologists this district is little of not at all known, and it offers to tourists 

 some of tho finest views and most striking scene) y in this beautiful county. 

 Tho hiUs are riclily wooded and much broken and diversified by extensive 



