Manual of conchology, structural and systematic : with illustrations of the species
Tryon, George W., (George Washington), 1838-1888
Pilsbry, Henry Augustus, 1862-1957
Sharp, Benjamin, 1858-1915
Philadelphia, Published by the Author, Academy of Natural Sciences, 1879-1898
Vols. 11-17 (published 1889-1898/8) by George W. Tryon, continued by Henry A. Pilsbry.
Vols. 11-17 have imprint: Published by the Conchological Section, Academy of Natural Sciences.
Originally issued quarterly, in 68 pts.
Consists of "First series, Marine univalves." Cf. p.  of covers of individual pts.
Find in a local library