PHYSARACEAE 



29 



Sporangia ovoid, shining, clustered ; stalks membranous. 



(10) Leocarpus. 



Fig. 18. — Leocirpus jragilis Rost. 



a. Cluster of sporangia. Magnified 2£ times. 



b. Hyaline threads and a branching lime-knot of the 



capillitium, with two spores. Magnified 120 times. 



C. Capillitium without lime-knots. 

 Sporangium-wall opaque, smooth. 



Fig. 19. — Diderma testaeium Pers. 



a. Group of three sporangia ; in the upper one the double 

 wall is broken away in part and the columella exposed. 

 Magnified 9 times. 



A. Portion of the outer and inner layers of the sporangium- 

 wall, to the latter the capillitium threads are attached ; 

 three spores. Magnified 170 times. 



Fig. 18. 



(11) Diderma. 



Fig. 19. 



Outer sporangium- wall gelatinous, translucent when moist ; 

 inner wall membranous. (12) Colloderma. 



Fig. 20. — Colloderma oculatum G. Lister. 



a. Moistened sporangium ; the dark mass of spores 



shows through the translucent walls. Magnified 

 13 times. 



b. Capillitium and spores. Magnified 140 times 



Fig. 20. 



Sporangium -wall opaque, rough with numerous blunt peg- 

 like prominences. 



(13) Physarina. 



Fig. 21. — Physarina echinocepkala von Hiihnel. 



a. Sporangia, Magnified 15 times. 



b. Capillitium and spores with fragment of sporangium- 



wall. Magnified 140 times. 



Fig. 21 



