A monograph of West American pyramidellid mollusks. This book, "A monograph of West American pyramidellid mollusks. Volume 11", by William Healey Dall, is a replication of a book originally published before 1909. It has been restored by human beings, page by page, so that you may enjoy it in a form as close to the original as possible. This book was created using print-on-demand technology. Thank you for supporting classic literature.