THE NAUTILUS. 55 



not the color markings of that species. The} 7 differ from P. 

 corvinus by a more solid texture and a smaller and different 

 shaped aperture. 



ANSON A. HINKLEY. 



BY BRYANT WALKER. 



Mr. A. A. Hinkley was horn at Farmersville, Indiana, No- 

 vember 26, 1857, and died in Du Bois, Illinois, July 23, 1920. 

 Living for a time at Rockford, 111., he moved to Du Bois in 

 1881. The accompanying portrait though executed in earlier 

 years is still an excellent likeness. 



Mr. Hinkley was an enthusiastic, energetic, enterprising and 

 most successful collector. I do not know when he first became 

 interested in conchology. His first note on the subject appeared 

 in "The Conchologists' Exchange," the predecessor of the 

 NAUTILUS in 1887. My own correspondence with him began in 

 1893. He had then already began to specialize on the Pleuro- 

 ceridse, which continued to be his favorite study all of his life. 

 Prior to that time he had taken two trips to Tennessee and had 

 participated in the results of R. E. Call's expeditions to Ala- 

 bama and Georgia. In 1894 and again in 1897 he collected in 

 Tennessee and Alabama. He was also one of the contributors 

 of "the sinews of war" to the remarkably successful work of 

 B. H. Wright in developing the Unione fauna of the southern 

 states in the decade prior to 1900. 



In 1903 he began the series of collecting trips which have given 

 him a permanent place in the history of American Conchology. 

 In the winter of that year he explored the Coosa and Black 

 Warrior rivers in Alabama. Two remarkable new genera, 

 Amphigyra Pils. and Neoplanorbis Pils., and many new species 

 of Somatogyrus, Ancylus and Quadrula were discovered. Mr. 

 Hinkley was the first to develop the minute species of Alabama, 

 which had been almost entirely overlooked by the early collec- 

 tors in that State, whose attention had been wholly absorbed 

 with the wonderful fauna of Unionidse and Pleuroceridse in that 

 region. 



