Outram, D. Uncertain legislator: Georges Cuvier’s laws of nature in their intellectual context // Journal of the History of Biology 19 (1986): 323–368.

Owen, G. E. L. Tithenai ta phainomena / In: Nussbaum, M., ed. Logic, science and dialectic: collected papers in Greek philosophy. Ithaca, NY, Cornell University Press, 1961/1986.

Owen, R. Lectures on the comparative anatomy and physiology of the invertebrate animals, delivered at the Royal College of Surgeons, in 1843. London, Longman, Brown, 1843.

Owen, R. Lectures on the comparative anatomy and physiology of the invertebrate animals: delivered at the Royal College of Surgeons. London, Longman, Brown, Green & Longmans, 1855.

Owen, R. On the anatomy of vertebrates. London, Longmans, Green, 1866.

Owen, R. Derivative hypothesis of life and species. London, Longmans, Green, 1868.

Paley, W. Natural theology. Oxford, Oxford University Press, 1809/2006.

Palsson, B. Ø. Systems biology: properties of reconstructed networks. Cambridge, Cambridge University Press, 2006.

Pease, A. S. Fossil fishes again // Isis 33 (1942): 689–690.

Peck, A. L. The generation of animals. Cambridge, MA, Harvard University Press, 1943.

Peck, A. L. Historia animalium: books I–III. Cambridge, MA, Harvard University Press, 1965.

Peck, A. L. Historia animalium: books IV–VI. Cambridge, MA, Harvard University Press, 1970.

Pellegrin, P. Aristotle’s classification of animals: biology and the conceptual unity of the Aristotelian corpus. Berkeley, CA, University of California Press, 1986.

Perfetti, S. Aristotle’s zoology and its Renaissance commentators, 1521–1601. Leuven, Leuven University Press, 2000.

Phillips, P. C. Epistasis – the essential role of gene interactions in the structure and evolution of genetic systems // Nature Reviews Genetics 9 (2008): 855–867.

Pimm, S. L. The balance of nature? Ecological issues in the conservation of species and communities. Chicago, IL, University of Chicago Press, 1991.

Pinto-Correia, C. The ovary of Eve: egg and sperm and preformation. Chicago, IL, University of Chicago Press, 1997.

Platt, A. De generatione animalium / In: Smith, J. A., and W. D. Ross, eds. The works of Aristotle translated into English. Vol. 5. Oxford, Clarendon Press, 1910.

Popper, K. R. The open society and its enemies. New York, NY, Harper Torchbooks, 1945/1962.

Preus, A. Science and philosophy in Aristotle’s biological works. New York, NY, G. Olms, 1975.

Proman, J. M., and J. D. Reynolds Differences in head shape of the European eel, Anguilla anguilla // Fisheries Management and Ecology 7 (2000): 349–354.

Pyle, A. J. Malebranche on animal generation: pre-existence and the microscope / In: Smith, J. E. H., ed. The problem of animal generation in early modern philosophy. Cambridge, Cambridge University Press, 2006. Pp. 194–214.

Quarantotto, D. Causa finale, sostanza, essenza in Aristotele: saggio sulla struttura dei processi teleologici naturali e sulla funzione del telos. Naples, Bibliopolis, 2005.

Quarantotto, D. Aristotle on the soul as a principle of unity / In: FÖllinger, S., ed. Was ist “Leben”? Aristoteles’ Anschauungen zur Entstehung und Funktionsweise von Leben. Stuttgart, Franz Steiner Verlag, 2010. Pp. 35–53.

Rackham, H., et al. Pliny: Natural history. 10 vols. Cambridge, MA, Harvard University Press, 1938–1962.

Radner, K. The winged snakes of Arabia and the fossil site of Makhtesh Ramon in the Negev / In: KÖhbach, M., ProchÁzka, S., Selz, G. J., and L. RÜdiger, eds. Festschrift für Hermann Hunger zum 65. Geburtstag. Vienna, Institut für Orientalistik, 2007. Pp. 353–365.

Rawlinson, G., et al. Herodotus: the histories. New York, NY, Everyman, 1858–1860/1997.

Rees, M. Just six numbers: the deep forces that shape the universe. London, HarperCollins, 1999.

Reiss, J. Retiring Darwin’s watchmaker. Berkeley, CA, University of California Press, 2009.

Ren, L., et al. The movements of limb segments and joints during locomotion in African and Asian elephants // Journal of Experimental Biology 211 (2008): 2735–2751.

Rodríguez PÉrez, D. Contextualizing symbols: “the eagle and the snake” in the ancient Greek world // Boreas: Münstersche Beiträge zur Archäologie 33 (2011): 1–18.

Roff, D. A. Life history evolution. Sunderland, MA, Sinauer Associates, 2002.

Roger, J. The life sciences in eighteenth-century French thought. Redwood City, CA, Stanford University Press, 1997.

Romm, J. S. Aristotle’s elephant and the myth of Alexander’s scientific patronage // American Journal of Philology 110 (1989): 566–575.

Rose, M. R. Evolutionary biology of aging. New York, NY, Oxford University Press, 1991.

Rosenblueth, A., et al. Behavior, purpose and teleology // Philosophy of Science 10 (1943): 8–24.

Ross, W. D. Metaphysica / In: Smith, J. A., and W. D. Ross, eds. The works of Aristotle translated into English. Vol. VIII. Oxford, Clarendon Press, 1915.

Ross, W. D. Aristotle. London, Routledge, 1995.

Rudwick, M. J. S. Georges Cuvier, fossil bones, and geological catastrophes: new translations & interpretations of the primary texts. Chicago, IL, University of Chicago Press, 1997.

Ruestow, E. G. Leeuwenhoek and the campaign against spontaneous generation // Journal of the History of Biology 17 (1984): 225–248.

Ruse, M. Charles Darwin and group selection // Annals of Science 37 (1980): 615–630.

Ruse, M. Do organisms exist? // American Zoologist 29 (1989): 1061–1066.

Russell, E. S. Form and function: a contribution to the history of animal morphology. London, John Murray, 1916.

Ryle, G. The concept of mind. London, Hutchinson, 1949.

Sander, K. Hans Driesch’s “philosophy really ab ovo”, or, why to be a vitalist // Roux’s Archives of Developmental Biology 202 (1993a): 1–3.

Sander, K. Entelechy and the ontogenetic machine: work and views of Hans Driesch from 1895–1910 // Roux’s Archives of Developmental Biology 202 (1993b): 67–69.

Scalitas, R. Mixing the elements / In: Anagnostopoulos, G., ed. A companion to Aristotle. Oxford, Blackwell, 2009.