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sutures of Ammonites, and demonstrated within that ex- 

 tensive and important genus the existence of a series of typi- 

 cal groups, each characteristic of a certain ränge of strata. 

 Following up these views , he proved the manifestation of 

 similar phenomena by the numerous forms of Brachiopoda. 

 His memoir on the Cystidea, also, is a model of philoso- 

 phical treatment. In all, he published nearly a hundred works 

 and memoirs , every one of which had the merit of being an 

 advance in knowledge. He wrote with singular clearness and 

 conciseness. In person Baron v. Buch was rather short ; his 

 countenance beamed with intelligence, and his manners and 

 address, whilst occasionally marked by slight eccentricities, 

 were kind and considerate in the highest degree wherever he 

 perceived merit. We believe that he was never married. He 

 was a member of almost every learned society in the world. 



