— xiv — 
Page 46, line 6, for Frulliana read Frullania. 
Page 49, line i, for wahlenbergii read Wahlenbergii. 
Page 49, between lines 6 and 7, insert: 
SwARTZiA MONTANA (Lamarck) Lindb. Moist shaded limestone edges; 
local near the shore on Mackinac Island. 
Page 52, line 9 from bottom, for Pterigyandrum read Pterygynandrum. 
Page 56, line 2 from bottom, for Eurynchium read Eurhynchium. 
Page 65, line 22 for cupresstforme read cupressiformis. 
Page 65, line 24. for curvifolium read curvifolius. 
Page 73, line 16 from bottom, for Teloschistes read Theloschistes. 
Page 77, line 8 from bottom, " ^ 
Page 79, line 2 from bottom, for lanuginosa read lanuginosum. 
Page 80, at bottom of page add: 
50. {Lecidea inter mixta ^y\,) 121. Patellaria Clavus D.C.) 
129. {Synechohlastus rupestris (Sw.) A. L. Sm.) 
Cornell University, Ithaca, N. Y. 
Page 106, line 5 from bottom, for Ramalina caper ata read Parmelia caper ata. 
