SOME ACCOUNT OE AN UNJ)ESCI[I l;i:i) 

 EOSSIL ERUIT. c*6» 



Head June 15th, 1847. 



The following imperfect account of a singularly beautiful 

 and instructive silicified Fossil has been hastily drawn u|), 

 to supply in some measure the possible want of any other 

 memoir for the present Meeting. 



The remarks which I am enabled to make, from detached 

 memoranda, on so short a notice, will principally serve to 

 explain the accompanying drawings, which I have carefully 

 superintended, and which exhibit a very satisfactorv micro- 

 scopic analysis of its structure, and do great credit to the 

 artistical talent of Mr. George Sowerby, jun. 



The only specimen of this fossil known to exist wns 

 brought to London in 1S43 by M. Koussell, an intelligrnt 

 dealer in objects of natural history. His account of it was, 

 that it had been in the possession of Baron Roget, an 

 amateur collector in Paris, for about thirty years ; that aftci 

 his death it was brought to public sale Avitli the rest of his 

 collection, but no offer being made nearly equal to the sum 

 he paid for it, which was 000 francs, it was bought in. It 

 was purchased here from M. Roussell jointly by the Ih'itish 

 Museum, the Marquis of Northampton, and juyself, for 

 nearly £30. It seems to have entirely es('a[)e(l the notice 

 of the naturalists of Paris. Nothing else is known of its 

 history, but from its obvious analogy in structiu-e and in its 

 mineral condition with Lqjidoxlrobus^ it may bo conjec- 

 tured to belong to the same geological formation. 



The specimen is evidently the upper half of a Strobihis 



