GLOSSARY. 313 



Perianth: the leaves of a flower that cannot be distinr 



guished into a calyx and corolla. 

 Figment: coloring matter. 

 Podal: pertaining to, or used as feet. 

 Polyp: a radiate animal, without locomotive organs, 



with retractile tentacles around the mouth, and a 



hollow body in which are suspended the digestive. 



and other organs. 

 Posterior: the rear end. 

 Prehensile: adapted for grasping or seizing. 

 Preoral: before, or leading to the mouth. 

 Process: a part prolonged or projecting beyond other 



parts connected with it. 

 Protoplasm: the semi-fluid, jelly-like contents of cells. 

 Protrusible: capable of being thrust forward. 

 Pulsating: throbbing, beating. 

 Punctate: dotted with depressions like punctures. 



Recurved: directed backward. 



Refracting: bending from a direct course. 



Reniform: kidney-shaped. 



Reticulated: with the form of a net. 



Retort: a chemical glass vessel. 



Retractile: capable of being drawn back or into the 

 body. 



Rudimental: imperfectly developed or formed; imma- 

 ture. 



Sacciform: sac-like or sac-form. 



Segment: one of the rings or component parts of a 



worm or other body. 

 Semi: in compound words, meaning half. 



