696 



0L0B8ABT. 



Those Ungulates with an un- 

 even number of toes, as the 

 liorse. 



Pe-ri-to-nb'um (Qwperi, 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-byn'ge-al. Relating to the 

 pharynx. 



Phy-log'b-ny (Gr. pfiulon, stem ; 

 ^«n«, birth). The development 

 by evolution of the members of 

 a genus, family, order, class, or 

 the animal kingdom as a whole. 



Pi'CE-ouB. 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 Coelenterates. 



Pla-typ'tb-ra (Gr. platvs, flat ; 

 pteron). The order of insects 

 represented by the white ants, 

 Psocidse and Perlidae. 



Plbx'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't-pite. The 

 separate animals of a Hydro- 

 zoon. 



Pre'o-ral. In front of the 

 mouth. 



Proc'esb. a projection; used 

 chiefly in osteology. 



Pro-Cce'lous (Gr. pro, front; 

 koUos, hollow). Those verte- 

 brae concave or hollow in front. 



PROC-TO-DiE'uM. The primitive 

 hind gut, or rectum. 



PRO-TOM'A-LiE. 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. 



Pbox'i MAL (Lnt. pi-oximus, next). 

 The fixed end of a limb, bone, 

 or appendage; that nearest the 

 body; opposed to distal, the 

 farther end. 



PsEU-DO-poDi-A (Gr. pseudes, 

 false; podes, feet). The tem- 

 porary processes sent out from 

 the hoAies oi- Protozoa. 



Pter-op'o-da (Gr pteron, wing; 

 poua,podos, fool). A class of 

 pelagic mollusks. 



Pu-bbs'cent. Coated with very 

 fine hairs. 



Punc'tured. Marked with nu- 

 merous small impressed dots. 



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

 or usually quiescent, chrysalis 

 stage of insects. 



Pt-lo'rus. The valve between 

 the stomach and intestine. 



Rat'i-t^ (Lat. ratis, a raft). A 

 division of birds with a keel- 

 less, raft- or punt-like sternum. 



Rhab'di TBS. The blade-like ele- 

 ments of the sting and oviposi- 

 tor of insects. 



Rhi-zo'po-da (Gr. Hm, root; 

 pons, podos, foot). The root- 

 footed Protozoa. 



