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GLOSSARY. 



Those Ungulates with an un- 

 even number of toes, as the 

 horse. 



PE-RI TO-NE'UM (Gr. peri, 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. 



PHA RYN'GE-AL. Relating to the 

 pharynx. 



PHY-LOG'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. 



PI'CE-ODS. Pitchy; the color of 

 pitch; shining reddish black. 



PI'LOSE. Clothed with pile, or 

 dense short down. 



PLAN'U-LA. The two - layered 

 embryo of Cceleuterates. 



PLA-TYP'TE-RA (Gr. plains, flat ; 

 pterori). The order of insects 

 represented by the white ants, 

 Psocidse and Perlidfe. 



PLEX'US (Lat. a knot). Applied 

 to a knot-like mass of nerves 

 or blood-vessels. 



POL-LEX. The thumb or inner- 

 most digit of the hand or fore- 

 foot. 



POL'Y-PIDE or POL'Y PITE. The 

 separate animals of a Hydro- 

 zoon. 



PRE'O-RAL. In front of the 

 mouth. 



PROC'ESS. A projection; used 

 chiefly in osteology. 



PRO-CCE'LOUS (Gr. pro, front; 



koilos, hollow). Those verte- 



brae concave or hollow in front. 

 PROC-TO-D/E'UM. The primitive 



hind gut, or rectum. 

 PRO-TOM'A-L^E. The second pair 



of head-appendages in Myrio- 



poda. 

 PRO'TO-PLASM (Gr. proton, first; 



plasma, from plasso, I mould). 



The albuminous, elemenlnry 



matter forming cells and the 



body-substance of Protozoa. 

 PROX'I MAL (L;\t. proximu*. next). 



The fixed end of a limb, bone, 



or appendage; that nearest the 



body; opposed to dixtal, the 



farther end. 

 PSEU-DO-PO'DI-A (Gr. pseitdes, 



false; podes, feet). The tem- 



porary processes sent out from 



the bodies of Protozoa. 

 PTER-OP'O-DA (Gr. pteron, wing; 



pous,podos, foot). A class of 



pelagic mollusks. 

 PU-BES'CENT. Coated with very 



fine hairs. 

 PUNC'TTJRED. Marked with nu- 



merous small impressed dots. 

 PU'PA (Lat. a doll). The third- 



or usually quiescent, chrysalis 



stage of insects. 

 PY-LO'RCS. The valve between 



the stomach and intestine. 



(Lat. ratis, a raft). A 

 division of birds with a keel 

 less, raft- or punt-like sternum. 



RHAB'DI TES. The blade-like ele- 

 ments of the sting and oviposi- 

 tor of insects. 



RHI ZO'PO DA (Gr. rim, root; 

 pom, podos, foot). The root- 

 footed Protozoa. 



