no 
Wisconsin Academy of Sciences , Arts and Letters. 
Teeth flat, not from a distinct basilar membrane. 
Cells of capsule linear-oblong . . . Dicranodoiitium, 77. 
Cells of capsule irregularly polygonal . . Didyinodon, 104. 87. 
Teeth not articulate. 
Teeth four , solid. 
Capsule linear-oblong, stems long, conspicuous . . Tetraphis, 186. 51. 
Capsule ovate, stems very short .... Tetrodontium, 187. 
Teeth thirty-two or sixty-four. 
Calyptra cucullate, capsule symmetric or nearly so. 
. Leaves undulate-crisped when dry, lamellae few (2—8), 
straight ........ Atriclmm, 255. 60. 
Leaves sub-tubulose at apex, lamellae undulate or 
numerous.* Olig'otriclmm, 258. 61. 
Calyptra cucullate, capsule unsymmetric, arcuate in¬ 
curved . Psilopilum, 259. 
Calyptra mitrate, densely hairy. 
Capsule not angular, teeth 32 .... Pogonatum, 260. 61. 
Capsule 4—6 angled, teeth 64 ... Polytrichum, 263. 61. 
* Peristome double. 
Capsule symmetric, erect. 
Teeth almost none, imperfect or rudimentary . MacromitriuMi, 178. 50. 
Teeth perfect, linear, revolute, capsule smooth . Schlotheimia, 179. 
Teeth linear or filiform, dark red or purple, capsule ribbed 
and twisted.Encalypta, 180. 50. 
Teeth broadly or narrowly triangular-lanceolate, pale, cap¬ 
sule ribbed, not twisted. 
Leaf-cells at base linear, chlorophyllose . . . Ulota, 160. 46. 
Leaf-cells at base hexagono-rectangular, hyaline Orthotrichum, 164. 47. 
Teeth linear, contracted at articulations, capsule smooth, 
cylindric.Leptothec'a, 251. 
Capsule unsymmetric, inclined or oblique or pendulous. 
Inner peristome a plaited cone. 
Pedicel thick, red, densely verrucose . . . Buxbaiilnia, 267. 
Pedicel very short, almost none .... Diphyscium, 266. 
