EXPLANATION OF PLATE I. 



Enteridium rozeaniiiii. Wing, p. 117. 

 Fig. I. ^Ethaliuni, natural size. 

 Fig. irt. Spore of the same species X 1400- 

 Fig. lb. Capillitium of the same species X 420. 



Clathroptychiiim rugiilosum^ Walh"., p 117. 

 Fig. 2. y'Ethalium, natural size. 



Fig. 2a. Sporangia and spores X 50 (after Schroeter). 

 Fig. 2b. Persistent apices of the peridia. 



Lindbladia effiisa., Ehr., p. 115. 

 Fig. 3. A group of sporangia X 30. 

 Fig. yi. A single spore X 1400. 



Tubulina cylindrka. Bull., p. i 14. 

 Fig. 4. A group of sporangia X 5- 

 See also Plate VII., Fig. S. 



Cribraria intricata., Schrad., p. 119. 

 Fig. 5. Three spoiangia, X 15. 



Fig, z^a. A single sporangiuin, to show reticulate thickening, X 60. 

 Fig. 5^. A spore, X 1400. 



Dictydinm ceniuiiin, Pers., p. 114. 

 Fig. 6. Sporangium, X 30. 

 Fig. 6rt. A part of the peridial wall, seen from within, X S4. 



Ccratiomyxa iniicidd, Pers., p. 114. 

 Fig. 7. Three sporiferous pillars, X about 40. 

 Fig. 7«. Tip of a single pillar, X S4. 



Hcmiarcyria slipafa, Schw., p. 135. 

 Fig. 8. Sporangia, X 6. 



Fig. 8(7. The capillitium of the .same species, X 750- 

 Fig. 8^. A single spore, X 1000. 



