302 



HALF-HOURS IN THE GREEN LANES. 



There is an outer and inner peristome, the latter 

 originating from the outer wall of the spore-sac 

 In addition even to the peculiarities of form and 

 structure just described, there are several others 

 which the reader will find described in Stark's 



Fig. 239. 



Fig. 240. 



Schistocarpous Frnit Section of upper part of Fruit of J/nium 



of Andreiea. hornum. a. Wall of Capsule ; b. Annul us; 



c. Lid ; d. Tooth of outer Peristome ; 



e. Tooth of inner Peristome ; /. Cavity of 



Sporangium and Spores ; g. Columella. 



' History of British Mosses/ and in the writings 

 of the best muscologist of the day, Dr. Braithwaite. 

 The Scale Mosses are many of them very in- 

 teresting objects. One of these, the Fringed Scale 

 MOSS (Ptilidium ciliare), occurs abundantly in heathy 



