6 CLASS XXIL ORDER Ml. 



ORDER II. Musci. 



A- Capsules with a lid and without a peristome.. 

 Sphagnum- Calyptre breaks off transversely, leaving 

 the lower half on the capsule : lid caducous. 

 15. Capsule with a lid and furnished with a single peris- 

 tome, proceeding from the outer surface of the capsule, 

 or from both inner and outer. 



Dicranum. Each tooth split part of the way from the 

 tip towards the base, incurved and solid, 16 in number. 

 Polytrichum. Tips of the teeth all meet in a flat mem- 

 brane, which extends over most of the mouth of the cap- 

 sule : calyptre mostly composed of hair. 

 &. Capsule with a lid, and furnished with a single per- 

 istome proceeding only from the inner surface of the cap- 

 sule. 



Jiarbula. Peristome consists of twisted filaments. 

 Diphifscium. Peristomes consist of wedge-shaped 

 rein-like processes. 



B. Capsules With a Hd, and furnished with a double per- 

 istome, the outer one consisting of 8 or 16 distinct teeth. 



firyum. Inner peristome consists of a membrane ter- 

 minating in pointed teeth not perforated, having between 

 them very fine delicate hairs : peduncles terminal. 



Hypnum. Inner peristome consists of a membrane 

 terminating in pointed teeth not perforated, having be- 

 tween them very tine hairs, to be seen with a good mag- 

 nifier : peduncles axillary. 



K Capsule with a lid, and furnished with a double per- 

 istome 9 outer one consisting of 16 connected teeth. 



Funaria. Outer teeth oblique and connected at the 

 tips ; inner are 16 filaments lying flat : peduncles terminal. 

 ORDER' III. HKPATICAE. 



Jangermannia; Capsules 4-valved with chain-like 

 seed-dispersers, peduncled, arising from a bell-form ca- 

 lyx. (An apophysis adjoins the capsule, and it has a sil- 

 very filamentous peduncle, which often grows several in- 

 ches in one night. The peduncle rises from a bell-form 

 calyx, which is more permanent than the fruit. In this 

 calyx the fruit lies concealed a while, at length it opens 

 and discloses a small shining black globule, which rises 

 on the silvery peduncle and bursts into 4 valves.) 



