EXPLANATION OF PLA TE VI 



Comatricha typlioidrs (Hull.) Rost., p. 181. 

 Fij:;. 1. A j^roup of sporangia, X 5. 

 Fig. 1 a. A single spore, X 1600. 

 Fig. 1 h. lip of the columella with its branches, X 50. 



C.dtnatr'u ha longa Peck, p. 175. 

 Fig. 2. A single empty sporangium, X 6. 

 Fig. 2 a. A part of the same taken near the apex, X 60. 

 Fig. 2 h. A spore, X 1400. 



'Comatr'ulia arqual'is Peck, p. 180. 

 Fig. 3. A single sporangium, X 10. 

 Fig. 3 a. The columella and capillitium, X 60. 

 Fig. 3 h. A single spore, X 1600. 



Figs. 3 c and 3 d. Sporangia to which the peridi\im still adheres, although ii 

 3 c ill shreds. 



Stcmonilis fu.ua Rost., p. 160. 

 Fig. 4. A group of sporangia, X 3. 



Fig. 4 rt. A part of the columella and capillitiiun, X 60. 

 Fig. 4 b. A single spore, X 1400. 



Slcmonilis axifrra (Bull.) Macbr., p. 168. 



Fig. 5. A group of sporangia, X 3. 

 Fig. b a. A single spore, X 1400. 



Fig. 5 /;. A part of the capillitium with columella, X 60. 



Strmonitis splrruir/is, p. 164. 

 Fig. 6. A group of sporangia, X 3. 

 Figs. 6 a and 6 c. Single spores, the latter X 1400. 

 Fig. 6 b. A part of the columella and branches, X 60. 



Fig. 7. A shorter variety of the same species with coarser meshes in capil- 

 litium, X 3. 

 Fig. 7 a. A part of the columella and net, X 60. 



