Explanation of Plate VI.— a, M. punctatum x i. b, Cap- 

 sule and operculum x 10. c, Leaf x a d, Var. e latum 

 e, Leaf of var. elatum x 4- f, Leaf of M. spinulosum x 20. 

 g and h, Apex and margin of same x 40. o, Leaf of M. hornum 

 X 10. p, Apex of the same ■ \o, 



