EXPLANATION OF I'LATE IV 



Tr'uliia prrsiiriilis Karst., p. 271. 

 Fifz;. 1. Vuv. iiilcnnidia, X about 6. 

 Fip;. 1 (I. Spore of same species, X 1400. 



Fig. 1 h. A second spore to show varyinjj; episporic networii. 

 I'itj. 1 c. Fip of elater, shows \ertical connecting hands. 



Tr'uliia drci pirns (Pers.) Machr., p. 276. 

 Fig. 2. Sporangia, X about 8. 

 Fig. 2 a. .\ spore of the same species, X 1400. 

 Fig. 2 /; and 2 c. Flaters of the same species, X about 225. 



Tridiia -varia (Pers.) Rost., p. 270. 

 Fig. 3. Sporangia, X about 8. 

 Fig. 3 a. A spore of the same species, X 1000. 

 Fig. 3 b. An elater of the same species, X 750. 



Tridiia scalira Rost., p. 271. 

 Fig. 4. Sporangia, X about 8. 



Fig. 4 a. A single spore of the same species, X 1400. 

 Fig. 4 /;. An elater-tip of the same, X 1400. 



Tridiia favof/inra (Batsch) Pers., p. 272. 

 Fig. 5. Sporangia, X about 8. 

 Fig. S a. A single spore of the same, X 1400. 

 Fig. 5 //. A single elater-tip of the same, X 1400. 



Tridiia prrsimilis Karst., \ar aliriipta Cke., p. 271. 

 Fig. 6. An elater-tip, X 1400. It will be noticed that the spirals are 



connected by vertical bars. 

 Fig. 6 a. A single spore of the same variety, X 1400. 

 Fig, 6h. A single spore, from the same sporangium as 6 a. 

 Fig. 6 c. Tridiia prrsimilis, a single spore, X 1400. 

 Fig. G d. 'Fip of an elater from the same, X 1400. 



308 



