2* MUSCI. 



Synopsis of the Genera. 



Sect. I. Seta (orfruitstalk) terminal. (Dicranum only offers 

 a few exceptions.} Acrocarpi. 



Subsect. I. Lid adhering to the mouth of the capsule, which is 

 destitute of peristome. Astomi. 



1. Andrea. Capsule 4-valved. 



2. Phascum. Capsule entire. 



Subsect. II. Lid deciduous; mouth of the capsule naked. 

 Gymnostomi. 



3. Sphagnum. Capsule sessile on a soft pedunculated recep- 

 tacle which resembles a fruitstalk. Calyptra irregularly torn. 



4. CEdopodium. Seta elongated, thick, fleshy. Calyptra 

 dimidiato-mitriform. 



5. Gymnostomum. Seta more or less elongated, slender, 

 rigid. Calyptra dimidiate. 



6. Anictangium. Seta more or less elongated. Calyptra 

 mitriform. 



7. Schistostega. Seta elongated. Lid very thick, marked 

 with radiating cells. Calyptra campanulate, at length cleft. 



Subsect. III. Lid deciduous ; mouthof the capsule furnished with 

 a peristome. Peristomi. 



Div. I. Peristome single. Aploperistomi. 



8. Diphyscium. Peristome a cone-shaped, plaited membrane. 

 Capsule oblique. 



9. Tetraphis. Peristome of 4 teeth. 



10. Splachnum. Peristome of 8 or 16 geminating teeth. 

 Capside with an evident apophysis. 



11. Cyrtodon. Peristome of 16, equidistant, entire teeth, 

 marked with a central line, incurved when dry. Capsule witli 

 an apophysis. Calyptra glabrous, without furrows. 



12. Conostomum. Peristome of 16, equidistant teeth, united 

 at their summits. 



13. Encalypta. Peristome of 16 teeth. Calyptra campa- 

 nulate, smooth, entirely enclosing the mature capsule. 



14. Weissia. Peristoma of 16, entire, equidistant teeth. 

 Calyptra dimidiate. 



15. Grimmia. Peristome of 16, entire or perforated, rarely 

 cleft, equidistant teeth. Calyptra mitriform. 



