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THE GEOLOGIST. 



it and our British strata. Except M. Barrande, indeed, the prince of 

 paleontologists, no one has entered more heartily into Bohemian 

 geology, especially of its older rocks, than my friend. We visited all 

 the principal silurian localities together, Dr. Fritsch commenting as he 

 went, till we came to the venerable " Stiper Stones" and the overlying 

 Tremadoc rocks of Shelve in Shropshire. Even these last, though 

 they have not yet distinguished them by a separate name in Bohemia, 

 he recognised as identical with the lowest bands of their second 

 fauna D, and in the main I believe he is quite right. 



The Lingula flags we were unable to visit, but Church Stretton 

 was within reach ; and when, on the very last half- day we had to 

 spare, we walked up the Carding Mill brook and found the Amielides 

 in place, he could scarcely believe his eyes. 



There they were, however, — the certain records of a sandy shore 

 gone by. And we obtained enough to convince him that it was 

 worth while to search his own " azoic" rocks. He has lately been 

 appointed to a new office in the Museum, but has used the little leisure 

 accorded him to search carefully for these old traces. In a letter 

 received to-day (July 8th) he tells me " In our Cambrian stratum B 

 I have at length found marks of annelides ! and I beg you to write 

 me in what book you have published the Arenicolites sparsus from 

 Church Stretton." 



Dr. Fritsch' s Sketch of Bohemian Arenicolite. 



All doubt is set at rest by the slight sketch he has sent. There 

 are the double holes characteristic of these old worm burrows. The 

 tubular hollows leading to them are seen on the sides of the slab, and 

 are identical with those of the Scolithus or Arenicolites figured in 

 Hall's American Paleontology, or in the last edition of." Siluria." 



So certain is it, that steady research will be rewarded in the most 

 barren formations. Now the same diligence must be given by our 

 Canadian cousins to the Huronian rocks of Lake Superior. In fact, 

 we must leave off calling rocks azoic. They only want hunting, in 

 proportion as they are old. 



I believe most fully that these coincidences in organic remains 

 oyer wide areas are not accidental. The fauna of the " zone primor- 

 diale" or Lingula flags, has turned up the same great group of trilo- 

 bites wherever it has been searched; and this, which is an older 

 formation still (perhaps much older), has shown, wherever it has 



