Cutting . — On Androgynous Receptacles in Marchantia. 351 
inflorescence, and the organ is rendered bilaterally symmetrical on account 
of it. On the under surface is to be found a dense mass of rhizoids, &c., 
and amongst these are often to be seen a number of sporogonia, thus 
showing that the archegonia are fertile. On some of these gametophores 
there are one or more irregular masses of tissue attached by a short stalk 
to the under surface (Fig. 5). The stalk quickly widens out from above 
downwards, and ends in an almost flat downwardly-directed disc of 
irregular shape and slightly crenate outline (Figs. 1 and 2). The disc, 
when looked at from below, is seen to resemble a lobe or a few lobes 
of the antheridiophore, and the surface, which is directed downwards, 
Fig. i. Side view of 
androgynous receptacle of 
Marchantia sp., showing a 
male outgrowth, xcirca 2. 
Fig. 2. Under surface of 
an androgynous receptacle, 
showing two male outgrowths 
one of which has branched, 
x circa 2. 
Fig. 3. An androgynous 
receptacle, view from above, 
x circa 2-5. 
is covered with minute punctations which, from a comparison with the 
sections, are evidently caused by the presence of antheridia. As many 
as three such masses have been noticed on some of these abnormal 
gametophores. 
A macroscopic examination does not show whether these antheridia- 
bearing lobes correspond to any definite lobe of the hermaphrodite 
receptacle or not. Sections, however, show very clearly that they are 
formed as outgrowths from a portion of the under surface of a female 
branch. In cases so examined it was found that archegonia were present 
at the base of the stalk of the outgrowth. This is clearly shown in Fig. 4. 
Here on the right hand we have a male outgrowth, and at the base an 
archegonium is shown, and a little to the right of this the involucre of 
the branch. The other sections in the series had other archegonia 
in a similar position; one only is put in the drawing for the sake of 
clearness. It would not be unlikely for the entire archegonia-bearing 
portion of a branch to grow out into a protuberance, but no such case 
