252 PROCEEDINGS OF IHE MALACOLOGICAL SOCIETT. 



In addition to these more extensive memoirs, Martens wrote over 

 200 separate papers in scientific publications, many of them being of 

 the greatest utility to the systematist. 



Besides his work on Mollusca, Martens wrote upon all branches of 

 zoology, but especially upon Crustacea and Echinoderms. He was 

 a most excellent correspondent and spared no trouble in giving 

 information and answering difiicult questions, and in this respect 

 he will be a great loss to many. Although personally unknown to 

 most English conchologists, we have been assured by those who had 

 the pleasure of his acquaintance that he possessed a most kind and 

 charming manner. 



With regard to the merit of Martens' conchological work, its 

 excellence is so universally admitted that no further comment or 

 recognition of its value becomes necessary. 



E. A. S. 



