304 BOTANICAL GAZETTE [may 
with a short foot with bulbous base. Elaters are not present 
but nutritive cells are found among the functional spore mother 
cells. In fig. 2 a diagram of the egg 
orientation and first segmentation is 
shown. The black epibasal segment is 
the ultimately sporogenous area, while 
the white hypobasal segment does not 
B B produce spore mother cells but is steril- 
ized. The distal-proximal specialization 
which arises in the sporophyte is thus 
seen to be connected with the first seg- 
Ve 2 Kanbeys of mentation plane of the egg. As ie be 
Spheerocarpus. noted in the next plant but one cecal 
ined, such distal-proximal specialization 
need not necessarily be foreshadowed by the first segmentation 
plane. 
Embryogeny of Marchantia.— This genus was studied by Hof- 
meister,” who investigated the embryo of Marchantia polymorpha. 
In the work cited: his pl. 1, fig. 16 shows an octant stage, 
Jig. 30, of the related plant Conocephalus conicus, shows less e 
rectly an early stage in the embryogeny provided with an apica 
cell which does not then exist. As in the case of the ae 
previously mentioned, the important researches on the cag 
of Marchantia were made by Kienitz-Gerloff® whose pl. 3 0 a 
memoir cited gives eleven figures of young embryos from = 
quadrant stage up to the differentiation of foot and capsule ie I 
the development of wall and archesporium. In was ee % 
particulars this embryogeny resembles that of pamee ; 
except that secondary transverse walls parallel to the baa ve 
are not formed in advance of anticlines and periclines a ots 
capsular region. The mature sporophyte is an ort ye 
ical capsule upon a short cylindrical foot which eT ae 
the last stages of maturation and projects the capsule 
7Op. cit. 56. 1851. 
* Vergleich. Unters. u. s. w. Bot. Zeit. 32: 167. 1874. 
