696 



GLOSSARY. 



Those Ungulates with an un- 

 even number of toes, as the 

 horse. 



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

 leino, 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 Coelenterates. 



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

 pterori). The order of insects 

 represented by the white ants, 

 Psocidse and Perlidae. 



PLEX'TJS (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-CXE'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^:. 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'I MAL (Lat. proximus, next). 

 The fixed end of a limb, bone, 

 or appendage; that nearest the 

 bod} r ; opposed to distal, the 

 farther end. 



PSETJ-DO-PO'DI-A (Gr. pseudes, 

 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'TURED. Marked witli nu- 

 merous small impressed dots. 



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

 or usually quiescent, chrysalis 

 stage of insects. 



PY-LO'RUS. The valve between 

 tlie 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. 



RHI-ZO'PO-DA (Gr. riza, root; 

 pous, podos, foot). The root- 

 footed Protozoa. 



