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GLOSSARY. 



Those Ungulates with an un- 

 even number of toes, as the 

 horse. 



PE-Ri-TO-NE'uM(Gr.£>m', 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-ous. 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 CoelentcMtes. 



Pla-typ'^i: itA (Gr. plat us, flat; 

 ■pterori). The order of insects 

 represented by the white ants, 

 Psocidre and Perlidse. 



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'ypite. The 

 separate animals of a Hydro- 

 zoon. 



Pre'o-ral. In front of the 

 mouth. 



Proc'ess. A projection; used 

 chiefly in osteology. 



Pro-ccelous (Gr. pro, front; 

 koilos, hollow). Those verte- 

 brae concave or hollow in front. 



Proc-to-d^'um. 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. 



Proximal (Lat. proximus, next). 

 The fixed end of a limb, bone, 

 or appendage; that nearest the 

 body; opposed to distal, the 

 farther end. 



Pseudo-po'di-a (Gr. pseiides, 

 false; podes, feet). The tem- 

 porary processes sent out from 

 the bodies of Protozoa. 



Pter of'o-da (Gr. pteron, wing; 

 pous,podos, foot). A class of 

 pelagic mollusks. 



Pubescent. Coated with very 

 fine hairs. 



Punctured. Marked with nu- 

 merous small impressed dots. 



Pu'pa (Lat. a doll). The third 

 or usually quiescent, chrysalis 

 stage of insects. 



Pylorus. The valve between 

 the stomach and intestine. 



Rat'i-t^e (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. 



Rui zo'po da (Gr. risa, root; 

 pons, podos, foot). The root 

 footed Protozoa. 



