Licence: Public Domain Mark
Credit: A first book in organic evolution / by D. Kerfoot Shute. Source: Wellcome Collection.
Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.
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![Pol-y-dac'tyl-ism [Gr. polys, many; daktylos, finger, toe.] The possession of an abnormally large number of fingers or toes. Pol-y-mor'phism [Gr. polys, many; morphe, form.] Exhibi- tion by a group of animals, as a species, of different types of form or structure. Po-lyp'te-rus [Gr. polypleros, many-winged.] Po-ly o-don [Gr. polys, many; odous, tooth.] Pol'yp [Gr. polys, many; pous, foot.] Pol'y-the-ism [Gr. polys, many; theos, god.] Po-rif'e-ra [Lat. porns, pore; fero, bear.] Pre-Pa-lae-o-lith'ic [Lat. prae, before; Palaeolithic.] The period of time preceding the Ancient Stone Age. Pri-mates [Lat. primus, first] An order of mammals, Pro-bos-cide-a [Gr. pro, before; bosko, feed.] Pro-nu'cle-us [Lat. pro, before; nucleus, kernel.] Pros en-ceph'a-lon [Gr. pro, before; enkephalos, brain.] A fundamental segment of the brain. Pro-to-hip'pus [Gr. protos, first; hippos, horse.] Pro-toph'y-ta [Gr. protos, first; phyton, plant.] Pro'to-plasm [Gr. protos, first; plasma, <plasso, form.] Pro-top'te-rus [Gr. protos, first; pteron, wing.] Pro to-zo'a [Gr. protos, first; soon, animal.] Pseu-do-he-red'i-ty [Gr. pseudes, false; Lat. heredita, heir- ship.] Pseu-do-po'di-a [Gr. pseudes, false; pous, foot.] Psy-cho-zo'ic [Gr. psyche, soul; zoe, life.] Pter-i-doph'y-ta [Gr. pteris, fern; phyton, plant.] Pter-o-sau'ri-a [Gr. pteron, wing; sauros, lizard.] Pti-lo'pus cinc’tus. Pupa, pi. pupae [Lat. doll, girl, f. of pupus, boy.] The third stage of those insects that undergo a complete metamorphosis. Pupae are often surrounded by protective envelopes called cocoons. Quad-ru'la sym-met'ri-ca. Qua-ter'na-ry [Lat. quatertiarius, consisting of four.] Ra-ti'tae [Lat. rat is, raft.] A group of birds whose sternum is without a keel; aborted wings. Including ostriches, emus, moas, rheas, etc. Rhi-noc'e-ros [Gr. rhis, nose; kerns, horn.] Rhi-zop'o-da [Gr. rhiza, root; pous, foot.]](https://iiif.wellcomecollection.org/image/b21900905_0316.jp2/full/800%2C/0/default.jpg)