8 MUSCI. (MOSSES.) 
Artificial Analysis of the Genera. 
I. ACROCARPI. Fruit terminal. 
A. Capsule without a deciduous operculum, 
8 ARCHIDIUM. Calyptra torn irregularly at the middle. 
§. BRUCHIA. Calyptra circumcissile at the base. Capsule apophysa' 
4 PHASCUM. Calyptra circumcissile at the base. Capsule not a 
* * Capsule dehiscing by 4 longitudinal slits. 
2. ANDRA. Capsule sessile on a pedicellate vaginula. 
B. Capsule dehiscing by a deciduous operculum. 
* Mouth of the capsule naked. 
+ Capsule sessile on a pedicellate vaginula. 
1. SPHAGNUM. Calyptra irregularly torn, persistent 
+ + Capsule on a proper pedicel: vaginula not pedicellate, 
6. GYMNOSTOMUM. Calyptra cuculliform. Antheridia terminal. 
: Antheri ES 
Ya mitriform. Ant 
a ‘RIUM. es ra mitriform. Antheridia 
40. HEDWIGIA. Calyptra conic. Antheridia axillary. 
* * Mouth of the capsule furnished with teeth. 
+ Peristome single. 
++ Teeth of the peristome 4. 
26. TETRAPHIS. Calyptra mitriform. Plants with @ conspicuous stem. 
27. TETRODONTIUM. Calyptra dimidiate-mitriform. Almost stemless plants, 
++ ++ Teeth of the peristome 16. Calyptra mitriform. 
a. Calyptra plicate 
8, PTYCHOMITRIUM. Teeth deeply bifid; their segments adherent. 
88. COSCINODON. ‘Teeth cribrose. 
a. 2-ranked. 
17. FISSIDENS. Teeth cloven half-way into two unequal segments, 
24, EUSTICHIUM. unknown. 
23, DISTICHIUM. Teeth lly entire ; if cloven, their segments equal. 
5. Leaves spreading every way. 
SF Capsule cernuous-inclined, unequal. 
14. DICRANUM. Teeth as in Fissidens. Leaves furnished with a costa, 
16. LEUCOBRYUM. Teeth asin Fissidens Leaves destitute of a costa, 
nee ‘Teeth deeply bifid. Calyptra fringed at 
LL. DICRANODONTIUM. Teeth deeply bifid. Cayp t e  am 
