EXPLANATION OF PLATK I. 



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— Perichetna depressa, Lib. 



— Ophiotheca Wrightii. B. & C. 



— Lachnobolus globosus, Schw. 



— Arcyria Cookii, Massee. 



— Arcyria minor, Schw. 



— Heterotrichia GabrielUc, Massee. (After Massee.) 



— Hemiarcyria pluinosa, Morgan. 



— Hemiarcyria funalis, Morgan. 



— Calonema aureum, Morgan. 



— Trichia fallax, Pers. 



— Trichia scabra, Rost. 



— Oligonema flavidum. Peck. 



NoTK. — F^ach figure exhibits the sporangium as it appears magnified 

 about ICO diameters, and the capillitiutn and spores magnified about 

 500 diameters. 



