Fig. 4. 
Fig. 6. 
Fig. 5. 
Plate XII. 
Fig. 1. a, Sterile and b, fertile thallus Anthoceros punctatus X 2 & 1. 
Fig. 2-6. Marchantia polymorpha, from Bryologist, 4:34-35, 1901. Fig. 2. 
Male plant a little reduced, showing antheridial receptacles. Fig. 3. 
Longitudinal section of antheridial receptacle magnified. Fig. 4. 
Female plant reduced showing the stalked receptacles which characterize 
this family. These receptacles vary in the family from the shape shown 
in this figure to almost perfectly conical and entire. Fig. 5. Section of 
a part of a female receptacle magnified, showing two sporogonia. The 
seta of one has elongated, pushing the capsule out from the outer fringe 
(involucre) and the inner fringe (perianth) at the base of the seta is a lit" 
tie collar representing the base of the broken calyptra. Fig. 6. Sterile 
thallus with gemmse. 
THE TRUE LIVERWORTS (MARCH ANTI ACE/E). 
The plants of this family consist of thallus of medium to large size, one- 
half to six inches in length, usually branching dicotomously but sometimes 
with more than two branches at a fork. They are attached to the substratum 
by numerous roothairs and are thickened in the middle to form a midrib. 
This in some cases is not vary apparent above but shows plainly underneath. 
The upper surface is covered with small pores (stomata) which are very 
apparent with a lens, except in Reboulia. The capsules are spherical or ovoid 
