Pons attenuata {Feck) Sacc. 



1 Mature and typical plants from Westport, N. Y, In the New 



York State herbarium, x i. 



2 Mature spores. 



3 A single cystidium showing how these bodies are formed by the 



enlargement and the encrusting of the ends of hyphae. From 

 teased preparations. 



4 A cystidium with part of encrustation removed. 



5 Hyphae from the subiculum and the trama. 



6 More irregular hypha occasionally found in the trama. 



7 Portion of the type collection of this species, x i. 



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