Tierbau und Tierleben in ihrem Zusammenhang betrachtet. These 2 bands form a monumental edition about biodiversity. The work is still considered as one of the standards on the subject.

Volume 1, Der Tierkörper as selbsständiger Organismus, by Richard Hesse, Leipzig und Berlin, 1910, B.G. Teubner. German, hardcover, 789 pages, 480 images, 15 prints. Upper corner band is folded (see photo) apart from this, the book in perfect condition.

Volume 2, Das Tier as Glied des Naturganzem, by Franz Doflein, Leipzig und Berlin, 1914, B.G. Teubner. German, hardcover, 960 pages, 740 images, 20 prints. The book is in perfect condition.