540 



MOSSES AND FERNS 



CHAP. 



examination reveals numerous oil-drops and some starch- 

 granules, mingled with roundish bodies of albuminous nature. 

 The latter absorb water and swell up so that they look like free 

 cells. 



The wall of the spore is very thick. The perinium is thick 



and transparent in appearance, and in the species under con- 

 sideration provided with short recurved spinules. The interior, 

 in microtome sections, is filled with coarsely granular cytoplasm, 

 which often appears spongy, owing no doubt to the dissolving 



