1 48 MORPHOL G Y. 



surface, while the delicate, pendulous fringes afford them pro- 

 tection from drying. An archegonium we see is not essentially- 

 different in marchantia from wiiat it is in riccia, and it Avill be 

 interesting to learn whether the sporogonium is essentially dif- 

 ferent from what we find in riccia. 



