2 parts in one volume, 8vo (192 x 110 mm). Four engraved folding plates; publisher's advertisement leaf at end. (Some very slight chipping to edges of two plates, some minor offsetting or spotting.) Contemporary calf gilt (rebacked to style). Provenance: S. Dillon Ripley (1913-2001), ornithologist, eighth Secretary of the Smithsonian (bookplate).

FIRST EDITION, published posthumously. "This classic treatise completes, with the Synopsis Quadrupedum et Serpentini, the author's contributions to vertebrate zoology, a series that should form part of every first-class library on natural history" (Wood p.529). Keynes, Ray 105.