Keywords: Bulletin of the Essex Institute BHL7708677.jpg Bulletin of the Essex Institute 7708677 32741 7933 Table of Contents 7 1875 http //www biodiversitylibrary org/page/7708677 1875 Essex Institute Public domain The BHL considers that this work is no longer under copyright protection <br> Biodiversity Heritage Library Check categories 2015 October 31 PD-old-70-1923 1875 books Bulletin of the Essex Institute Images uploaded by Fæ Files from the Biodiversity Heritage Library Biodiversity Heritage Library Ernst Mayr Library of the MCZ Harvard University collection |