EXPLANATION OF PLATE XVIII 



Arcyria incarnala Pers. 



Figs. 461, 462, 463. Habit, X 7; capillitium, X 1200; spore, X 1200. 



Arcyria ferruginea Sauter 



Figs. 464, 465. Habit, X 10; spore, X 1200. 



Lachnobolns globosus (Schw.) Rost. 



Figs. 466, 467. Habit, X 15; spore, X 1200. 



Arcyria pomiformis (Leers) Rost. 



Figs. 468, 469, 470. Habit, X 25; capillitium with forked and unforkedjree ends, 

 . X 1200; spore, X 1200. 



Arcyria digitata (Schw.) Rost. 



Figs. 471, 472. Habit, X 5; spore, X 1200. 



Arcyria denudata (L.) Wetts. 



Figs. 473, 474, 475. Habit, X 10; capillitium, X 1200; spore, X 1200. 



Lachnobolus occidentals Macbr. 



Figs. 476, 477. Habit, X 15; spore, X 1200. 



Prototrichia melallica (Berk.) Massee 



Figs. 478, 479, 480. Habit, X 10; capillitium, X 1200; spore, X 1200. 



Oligonema flavidum Peck 



Figs. 482, 483, 484, 485, 488. Spores, X 1200; habit, X 10; short, thick elater of 

 brevifilum type, X 600; portion of longer, thinner elater, X 1200. 



Oligonema fulvum Morg. 



Figs. 486, 487. Capillitium, X 1200; spore, X 1200. 



Oligonema nitens (Lib.) Rost. 



Figs. 481, 489. Elater, X 1200; spore, X 1200. 



Trichia contorta (Ditm.) Rost. 



Figs. 490, 491. Habit, X 15; spore, X 1200. 



Trichia inconspicua Rost. 



Figs. 492, 493. Habit, X 15; spore, X 1200. 



