INVERTEBRATE ZOOLOGY 
Mr. Frederick M. Holbrook, who identified and catalogued turtles in 
1898, and Dr. L. W. Williams, who made the large model of the com- 
mon squid in 1906. 
The present Scientific Staff of this Department includes also three 
Honorary Curators: Professor William Morton Wheeler, Dr. Alexander 
Petrunkevitch, and Professor Aaron L. Treadwell. 
Dr. Alexander Petrunkevitch, an authority on American spiders, Alexander 
Pet' run kc^ 
became an Honorary Curator of Arachnida in 1909. Dr. Petrunkevitch vitch, Ph.o. 
has rendered valuable service to the Museum through correspondence, '^"^^ 
Aaron L. 
exchange, and the general enrichment of the collections. Treadweii, 
Professor Aaron L. Treadwell, of Vassar College, was appointed pjf q 
Honorary Curator of Annulata in 1909. 
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