Manual of conchology, structural and systematic : with illustrations of the species / by George W. Tryon, Jr.
Tryon, George W. (George Washington),
Pilsbry, Henry Augustus,
Published by the Author, Academy of Natural Sciences,
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.