Washington DC: Government Printing Office, 1906. Illustrated. Hardcover. 264pp. Quarto [29 cm] 3/4 black cloth with speckled paper covered boards. Very good. Ex-library. The covers are lightly rubbed. The underlying boards are exposed along the edges. Library label on the spine. There is a very tiny stain on the fore edge of the text block. The endsheets are very mildly soiled. Library bookplate on the front pastedown. The title page has a couple of library markings. There is a small closed tear in the bottom corner of the Letter of Transmittal page. The pages are mildly browned. The book is sturdy. Item #25639
Discusses Pliocene Pectens and Oligocene Pectens.