Cambridge, Mass.: Nuttall Ornithological Club. University Press, Cambridge: Printed by Welch, Bigelow, & Co. [53]-84, [6] p.: line drawings, tables; 25 cm. (10 inches). Buff paper wrappers (paperbound) printed in black. Six unpaginated pages following text include an advertisement for Wm. Read & Sons, importers of and dealers in fine guns. The back cover also includes advertisements for Fox's patent breech-loader (also illustrated), manufactured by the American Arms Co., Boston; the Boston shooting suit; and duck decoys by G.W. Simmons & Son, Boston. Contents: Description of a New Species of Humming-Bird from California by H.W. Henshaw -- The Birds of Guadalupe Island, Discussed with Reference to the Present Genesis of Species by Robert Ridgway -- An Undescribed Hybrid Between Two North American Grouse by William Brewster. In Good- Condition: wrappers are slightly soiled and separating at spine; back wrapper has one horizontal tear most of the way across. Pages are clean and tight. A scarce issue of this important 19th-century ornithological bulletin.. Good-.