Poland 



(1) A montane grassy slope (Ceylon). (2) A grassy slope 

 with a moderate supply of moisture, resembling a Savanna. 



Pathogen 



An organism or virus that causes disease. 



Pathology 



The study of diseases. 



Patocole 



An animal that spends a regular part of its normal life 

 outside of the forest floor but lives transiently in it. 



Patoxeite 



An animal that occurs accidentally in the litter of the 

 forest floor. 



Pattern 



The arrangement formed by the occurrence of indivi- 

 duals or groups of organisms in an area, such as Contagious 

 dispersion, Hypodispersion, and Normal dispersion (q. v.). 



Peat 



An organic soil consisting of partially decomposed or- 

 ganic remains which can be identified as to the kind of con- 

 stituent plants. It accumulates in water or under wet condi- 

 tions, cf. Muck. 



Peck-dominance 



The dominance of one bird over another in a flock, ap- 

 plied also to other animals, cf. Social dominance. 



Peck-order 



The order of dominance of some birds over others in a 

 flock, applied also to other animals. 



Peck-right 



The dominance of one bird over all the others iri a flock. 



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