_perissos_, uneven; _daktulos_, finger).
Applied to those Hoofed Quadrupeds (_Ungulata_) in which the feet
have an uneven number of toes.
PETALOID. Shaped like the petal of a flower.
PHACOPS (Gr. _phake_, a lentil; _ops_, the eye). A genus of
Trilobites.
PHALANGES (Gr. _phalanx_, a row). The small bones composing the
digits of the higher _Vertebrata_. Normally each digit has three
phalanges.
PHANEROGAMS (Gr. _phaneros_, visible; _gamos_, marriage). Plants
which have the organs of reproduction conspicuous, and which
bear true flowers.
PHARYNGOBRANCHII (Gr. _pharugx_, pharynx; _bragchia_, gill). The
order of Fishes comprising only the Lancelet.
PHASCOLOTHERIUM (Gr. _phaskolos_, a pouch; _therion_, a beast).
A genus of Oolitic Mammals.
PHRAGMACONE (Gr. _phragma_, a partition; and _konos_, a cone).
The chambered portion of the internal shell of a _Belemnite_.
PHYLLOPODA (Gr. _phullon_, leaf; and _pous_, foot). An order of
_Crustacea_.
PINNATE (Lat. _pinna_, a feather). Feather-shaped; or possessing
lateral processes.
PINNIGRADA (Lat. _pinna_, a feather; _gradior_, I walk). The
group of _Carnivora_, comprising the Seals and Walruses, adapted
for an aquatic life. Often called _Pinnipedia_.
PINNULAE. (Lat. dim. of _pinna_). The lateral processes of the
arms of _Crinoids_.
PISCES (Lat. _piscis_, a fish).
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