164 
Wisconsin Academy of Sciences, Arts and Letters . 
Page 80, under DXCRANELLA, read: 
L Cells of the exothecium rectangular-quadrate; seta red; costa narrow 
and well defined beloio. 
Page 31, line 1, read: 
U. Cells of the exothecium prosenchymatous; seta often yellow; costa 
usually broad and indistinct below. 
Page 32, set D. palustre, 19. opposite line 11 and dele lines 12 and 13. For 
line 19, substitute: 
Papillose at back. 
Capsules solitary. D. spnrinm, 21. 
Capsules clustered ...... D, Brummondii, 22, 
Under 2, dele line a. 
Page 33, line 13, for to, substitute B. 
Page 43, after line 15, insert: 
[G. Pennsylvanica will be sought here.] 
Page 47, for last 3 lines, substitute: 
Capsule wholly exserted. 
Smooth when dry, defluent into seta ... 0. Isevigatum, 2. 
Furrowed when dry, abrupt at base .... 0. Douglasii, 6. D 
Page 48, for line 5 from bottom, substitute: 
Capsule furrowed when dry.0. Douglasii, 6. 11 
Page 64, under NECKERA, in lines 2 and 4, read: 
Plants slender (shoots 1—2 mm. wide), etc. 
Plants robust (shoots 3—4 mm. wide), etc. 
Page 65, to Hookeria Sullivantii, add foot note: 
Muller writes (July 18, 1888): “Die Hoolcerict Sullivantii mihi unterscheide ich auch 
heute noch von H. lucens und ebenso von H. acutifolici aus Indien.”. Fide Mrs. E. G. 
Britton. 
Page 66. under THEM A, for last two lines, substitute: 
Usually bi-furcate, teeth long (1:17—20), leaves ciliate T. asprella, 2. 
Usually 4 furcate, teeth short (1:12), leaves not ciliate T. Lescurii, 4. 
1 The position of the stomata of this species is still uncertain, and until it is found again 
no more definite characterization of it seems possible. 
