EXPLANATION OF PLATE VII 



Diaihara splnidrns Peck, p. 187. 

 Fig. \. Sporangia aiui li\ pothallus, X 25. 

 Fig. 1 a. Oapillitium, X 50. 

 Fig. 1 /;. Spores, X 900. 

 Fig. 1 c. Portion of the capillitiuin, X 150. 



Didyin'iutn iiit/ripis Fr., p. 123. 

 Fig. 2. Sporangia, X 30. 

 Fig. 2 a. A spore, X 1400. 

 Fig. 2 b. Calcareous crystals from the peridial wall, X 750. 



Didym'iiiin mrlaiinsprnnum (Pers.) Macbr., p. 121. 

 Fig. 3. Sporangia, X 10. 

 Fig. 3 «. A single spore, X about 1000. 



DiJrrma Irsltuium (Schrad.) Pers., p. 137. 

 Fig. 4. Sporangia; the first exhibiting the two peridial ^valls and the 



spore-mass, X 10. 

 Fig. 4rt. Spore, X 750. 

 Fig. 4/;. (\ipillitial threads, X 750. 



D'tdrnna (/lohnsuw Pers., p. 134. 

 Fig. 5. Sporangia; the first with the outer peridiuiii broken awa_v, X 10. 

 Fig. 5 a. A single spore, X 750. 



MiicUaijo spoju/insa (Leyss.) Morg., p. 114. 



Fig. 6. An a?thaliuin, borne on a grass-stem, natural size. 

 Fig. 6 a. A spore, X 750. 



Fig. 6 b. Capillitium, \vith surface calcareous crystals, X 750. 



Didirina cnistadtim Peck, p. 13 5. 

 Fig. 7. A mass of clustered sporangia, to show habit of aggregation, nat- 

 ural size. 



Tuliifna frrnu/innsa (Batsch) Macbr., p. 206. 

 Fig. 8. A single spore, X 1400. 



