Notes on American Species of Triacanthagyna and Gynacantha.
Ann Arbor, MI: The University of Michigan, 1923. 8vo. 79 pp. Spine ends and corners are very lightly bumped, some pages uncut, museum stamp to top right corner of cover . Otherwise book is in excellent condition. University of Michigan Museum of Zoology, Miscellaneous Publications No.9. Very Good Paperback (Item ID: 70446)