80 Wisconsin Academy of Sciences , Arts and Letters. 
% 
a 
Leaves not bordered, costa vanishing, dioicous, capsule 
ovate-oblong.M. cinclidioides, 17. 
Upper leaf-cells isodiametric, costa vanishing M. hyin enopkylloides, 20. 
CINCLIDIUM, p. 249. 
Leaf margin of 4-5 rows of cells, laminal cells irregularly 
disposed.C. stygium, 1. 
Leaf margin of 2 rows of red cells, laminal cells in rows 
oblique to costa.C. siihrotundum, 2. 
AULACOMNIUM, p. 25 2. 
Leaves coarsely serrate to middle, autoicous . A. heterostichum, 5. 
Leaves serrulate near apex, acute or acuminate, dioicous. 
Stem leaves long acuminate, very roughly papillose A. papillosum, 4. 
Stem leaves acute. 
Stems commonly prolonged and gemmiferous, male 
flowers terminal, gemmiform . . A. aiidrogynmn, 1. 
Stems not commonly gemmiferous, male flowers dis¬ 
coid . A. palnstre, 2. 
Leaves entire, obtuse .. A. turgiduin, 3. 
[The leaves of A. palustre are entire when young, but soon become erose crenulate.] 
TIMMIA, p. 254. 
Capsule irregularly plicate when dry, segments appendicu- 
late.T. Megapolitana, 1. 
Capsule costate at mouth when dry, segments not ap- 
pendiculate.T. Austriaca, 2. 
ATRICHUM, p. 255. 
Costa lamellose on upper side only. 
Lamellae 2-6, entire, lamina with teeth on surface. 1 
Lamellae 4-6 cells high. 
Leaves acute, serrate for f length 
Leaves bluntish, serrate above middle only. 
Teeth double, aculeate .... 
Teeth single, short . 
Lamellae 9-13 cells high. 
Lamellae 4-8, serrate. 
Lamellae 1-3, 1-3 cells high, lamina smooth 
A. undulatum, 1. 
A. augiistatum, 2. 
A. xaiithopelma, 4. 
A. Selwyni, 3. 
. A. Lescurii, 5. 
A. crispum, 6. 
Costa lamellose on both sides, lamina with longitudinal 
rows of teeth on back 
A. parallelum, 7. 
1 Excluding A. xanthopelma? 
