SECRETARY'S REPORT 35 



On September 13, 1954, Dr. J. F. Gates Clarke replaced Dr. E. A. 

 Chapin who retired on January 31, 1954, as curator of the division 

 of insects under a transfer from the Insect Identification and Parasite 

 Introduction Section of the Entomology Research Branch of the U. S. 

 Department of Agriculture. 



Dr. Richard E. Blackwelder, associate curator, division of insects, 

 resigned effective October 29, 1954. Dr. R. Tucker Abbott, associate 

 curator, division of mollusks, resigned November 10, 1954, to accept 

 a position at the Academy of Natural Sciences of Philadelphia. 



Austin II. Clark, research associate, who retired as curator, divi- 

 sion of echinoderms, December 31, 1950, after serving more than 

 42 years as a member of the staff, died on October 28, 1954, at Wash- 

 ington, D. C. 



The department of geology lost, through death, oti June 6, 1955, 

 the valuable services and stimulating associations of Dr. John Putnam 

 Marble, research associate in the division of mineralogy and petrology 

 since 1948. 



Respectfully submitted. 



Remington Kellogg, Director. 



Dr. Leonard Carmiciiaeil, 



Secretary, Smithsonian Institution. 



