696 
Those Ungulates with an un- 
even number of toes, as the 
horse.: 
PE-RI-TO-NE'UM (Gr. pert, around; 
teino, I stretch). The mem- 
brane lining the abdominal 
walls and covering the enclosed 
viscera. 
PER-I-VIS'CE-RAL (Gr. °° peri, 
around; Lat. viscera, the inter- 
nal organs, especially of the 
abdominal cavity). The body- 
cavity containing the alimen- 
tary canal with its outgrowths. 
Pua-Ryn'GE-AL. Relating to the 
pharynx. 
Puy-.oe’e-ny (Gr. phulon, stem; 
gene, birth). The development 
by evolution of the members of 
‘a genus, family, order, class, or 
the animal kingdom as a whole. 
Pr'ce-ovus. Pitchy; the color of 
pitch; shining reddish black. 
Py'Losz. Clothed with pile, or 
dense short down. 
Puan'v-La. The two - layered 
embryo of Coelenterates. 
Pua-Typ’TE-RA (Gr. platus, flat ; 
pteron). The order of insects 
represented by the white ants, 
Psocide and Perlidex. 
PLeEx'vs (Lat. a knot). Applied 
to a knot-like mass of nerves 
or blood-vessels. 
Pou-Ltex. The thumb or inner- 
most digit of the hand or fore- 
foot. 
Pot'y-PIDE or Pou'y-PITE. The 
separate animals of a Hydro- 
zoon, 
Pre'o-RaL. In front of the 
mouth. 
Process. A projection; used 
chiefly in osteology. 
‘GLOSSARY. 
Pro-ca'Lous (Gr. pro, front; 
koilos, hollow). Those verte- 
bree concave or hollow in front. 
Proc-to-pz&'umM. The primitive 
hind gut, or rectum. 
Pro-tom'a-L&. The second pair 
of head-appendages in Myrio- 
poda. 
Pro'to-PLasM (Gr. protos, first; 
plasma, from plasso, I mould). 
The albuminous, elementary 
matter forming cells and the 
body-substance of Protozoa, 
Prox't-MAL (Lat. proximus, next). 
The fixed end of a limb, bone, 
or appendage; that nearest the 
body; opposed to distal, the 
farther end. 
PsEevu-po-po'pi-a (Gr. pseudes, 
false; podes, feet). The tem- 
porary processes sent out from 
the bodies of Protozoa. 
PreR-op'o-pa (Gr pleron, wing; 
pous, podos, foot). A class of 
pelagic mollusks. 
Pu-BEs'cENT. Coated with very 
fine hairs. 
Punc'tuRED. Marked with nu- 
merous small impressed dots. 
Po'pa (Lat. a doll). The third 
or usually quiescent, chrysalis 
stage of insects. 
Py-Lo’rvs. The valve betweer 
the stomach and intestine. 
Rast (Lat. ratis, a raft) A 
division of birds with a keel- 
less, raft- or punt-like sternum, 
RaazB'pr-Tes, The blade-like ele- 
ments of the sting and oviposi- 
tor of insects. 
Rar-zo’po-pa (Gr. 
pous, podos, foot). 
footed Protozoa. 
riza, root; 
The root- 
