280 MYCETOZOA 



Pseudo-capillitium : Tlio name applied to the imperfectly developed 

 walls of the component sporangia of an aethalium, that may 

 resemble true capillitium. i 



Pseudo-colxjmella : In the Physaraceae, a mass of lime-knots 

 confluent in the centre of the sporangium, resembling a columella 

 but remaining free from the stalk. 



Pulvinate : Cushion-like. 



Pyrieorm : Pear-shaped. 



Sclerotium : The resting condition of the plasmodium ; it is formed 

 of numerous, closely compacted cysts, the " sclerotium cysts," 

 each consisting of a mass of cytoplasm with ten to twenty nuclei, 

 and enclosed by a wall of cellulose ; the dry horny sclerotium 

 may retain its vitality for several years. 



Sporangium : A receptacle containing spores. 



Sporophore : A structure bearing spores on its surface (compare 

 Ceratiomyxa ). 



Swarm-cell : The protoplasmic body that emerges from the spore on 

 germination ; it contains a nucleus and contracting vacuole ; at 

 first it is amoeboid, later it becomes pear-shaped with the narrow 

 end prolonged into a flagellum with which it swims in the water. 



Terete : Having a circular transverse section. 



Turbinate : Top-shaped. 



