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8 case is devoted to the types of Binney, and in the same way when received and arranged the Lea collection of Unionidae and other freshwater types will form a special series. In this connection it is my sad duty to refer to the death, December 8, 1886, of Dr Isaac Lea, for many years the oldest living American student of mollusks and known all over the world for his researches on the Naiades, especially of North America. Dr. Lea had been a valued correspondent and friend of the museum from its earliest stages and had given large numbers of valuable specimens to the collection. In his will, subject to certain reasonable conditions, he left