The complete paleontological works written by Kovalevsky, as distinct from his famous translations of western books into Russian, including Darwin's The variation of animals and plants under domestication, Darwin's The descent of man, Darwin's The expression of emotions in man and animals, and Lyell's Geological evidences of the antiquity of man.

"Reprints in Facsimile of paleontological monographs by Kovalevsky: 1. Sur l'Anchitherium aurelianense Cuv. et sur l'histoire paléontologique des chevaux (1873). 2. On the Osteology of the Hyopotamidae (1874). 3. Monographie der Gattung Anthracotherium Cuv. und Versuch einer natürlichen Classification der fossilen Hufthiere, followed by 4. Osteologie des Genus Anthracotherium Cuv. (1876). 5. Osteologie des Genus Entelodon aym. (1876). 6. Osteologie des gelocus aymardi (1876-77). In his essay "Mr. Sophia's Pony", Stephen Jay Gould writes about this book: "In the late 1970s, I edited an ill-fated thirty-volume collection of . . . reprints in the history of paleontology. (The volumes were lovely, but the press went belly-up--for other reasons I trust--soon after the collection appeared. I assume that most printed copies ended up in the shredder). I decided to collect all of Kovalevsky's papers together in one volume--his articles in German from the journal Palaeontologica; his English monograph, submitted by T. H. Huxley for publication in the Philosophical Transactions of the Royal Society of London; and his famous French treatise on the evolution of horses, published back home in the Mémoires de l'Academie Impériale des Sciences de St.-Pétersburg (but not in Russian, so that wide readership would be possible. . . .) The six papers made a substantial, but not particularly hefty, volume" (p. 146 in Gould's book, Leonardo's Mountain of Clams and the Diet of Worms)" (Malcolm Jay Kottler)