CLASSIFICATION. 65 



of the leaves ; capsule nearly spherical, turned to one side, 

 ribbed when dry ; peristome none, simple, or double. 



Includes Bartramia (fig. 17), Conostomum, Philonotis 

 (fig. 27). 



Tribe XII. Meesiea. Leaves three to eight ranked ; cap- 

 sule with long fruit-stalk, and long-necked, turned to one 

 side ; peristome double ; outer teeth much shorter than the 

 sixteen segments of the keeled membrane, absent in Cato- 

 scopium. 



A tribe of mosses nearly allied to the next following, in- 

 cludes Catoscopium, Amblyodon, Meesia, Paludella. 



FIG. 35. Mniu tn fiunctatu in. Natural size. 



Tribe XIII. Byrecz. Plants of various size ; leaves simple 

 nerved, generally toothed ; leaf-cells prosenchymatous, equal, 

 smooth ; capsule globose, egg-shaped, or pear-shaped, turned 

 to one side, horizontal or pendent, very rarely erect ; peri- 

 stome generally double ; teeth transversely barred ; inner 

 membrane divided into segments alternating with the teeth, 

 generally separated by cilia (hair-like divisions of the inner 

 peristome). 



A very natural group of beautiful mosses, often requiring 

 very careful dissection and examination for their proper 

 determination, including Leptobryum, Webera, Bryum (fig. i), 

 Mnium (figs. 21, 28, and 35). 



