Xll — 
line 28, for Muhlenbeckii read Muhlenbergii. 
line 3 from bottom, for Sulliv. read (Sulliv.) Grout. 
bottom line, for Lindb. read (Lindb.) Correns. 
Page 26, line 9, for B. & S. read R. & C. 
line 18, for Pers. read Crome. 
line 24, for B. & S. read Lindb. 
line 26, for americana read americanum. 
Page 52, fifth line from bottom, for thelistegium read thelistegum. 
Page 74, line 14, for osmundaceae read osmundacea. 
Page 81, line 10, for Fungf. read Fungi. 
Page 86, line 17, for Heterocladum read Heterocladium. 
Page 86, line 7 from bottom, for vancourveriense read Vancouver iense. 
