O^E’XOEl OX’ 
Exchanges Made in Recent and Fossil Shells and Plants. 
Large Collections of Florida Species for Exchange 
Astronomical Calculations 
Made for Almanacs for All Countries. 
Manuscripts for 1889 Now Ready. 
Unionidae a Specialty. Specimens Named. 
Lists of Disiderata and Duplicates Exchanged. 
1 TO Mm - 4 . 
Penn Yan, N. Y., May 1 to NQ ' V; 1 . 
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