452 



KNOWLEDGE. 



December, 1913. 



Figure 532. 

 a. b and c. Early stages of growth when the fungus is still yellow. 



d. The fungus filled with a colourless liquid. 



e. The partial formation of the sporangium. 



f. A mature specimen studded with beads of moisture. 



The portion below the dotted line is usually hidden below the surface of 



the soil. 



Figure 533. 



The collapse of the 

 tissues after the ex- 

 plosion. 



Figure 534. 



g. Sporangium, highly mag- 

 nified, with a number of 

 spores still adhering to the 

 inner surface. 



h. A single spore magnified 

 about S00 diameters. 



Stages in the life history of Pilobnlits cry stall i it us. 

 (See page 453.) 



., my. 



ft /US' 



Figure 535. 

 Dendromonas virgaria W'eisse (after Kent). 



a. An isolated monad, highly magnified. 



b. A colony of two monads in process of longitudinal division. 



(See page 466.) 



Figure 536. 



The partial eclipse of the Sun, 1913, September 29th. 



From a photograph taken with a telephoto lens at the 



Union Observatory, Johannesburg, South Africa, by Mrs. 



H. E. Wood. 



(See page 459.) 





