500 



COMPARATIVE MORPHOLOGY OF FUNGI 





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Fig. 319. — Clathrus cancellatus. 1. Median section of very young fructification. 

 Per, peridium; z. str, columella; Zstr. zw., branches of columella; Zw. gefl., intermediate 

 tissue; 2. Older stage. H.a., palisade fundaments; Rp, receptacle knot; V.G., volva gel 

 plate; 3. Differentiation of knot of Rp., older stage; Gl. Km., glebal cavities; Zw. gefl. pi., 

 plates of intermediate tissue; Tr., tramal plates. 4. Columella and branches with tramal 

 plates. 5. Diagram of young fructification. 6. Section of mature fructification. 7. Sec- 

 tion of young egg where the gleba has begun to turn green. (1 to 6 X 18;7 X2; after 

 Fischer, 1891.) 



