6 
Miyake, The development of the gametophytes etc. 
they first appear, are seen as swellings on the axile of the sporo- 
phyll. Each sporophyll contains three ovules. The development 
of the integument and the formation of the megaspore oecurs in 
early spring of the next year. 
The megaspore mother-cell becomes differentiated shortly be¬ 
töre pollination. Only one megaspore mother-cell is forrned in each 
ovule and is situated about on the same level as the point of in- 
sertion of the integument (fig. 42). In this respect Cunninghamia 
agrees with Taxodium (Coker, 1903) and differs from Cryptomeria 
Text-fig. 2. Pistillate cones at the time of pollination, seen fromjjithe upper side 
of a branch. About X 3 / 4 . 
(Lawson, 1904b) where a group of three or four 'mother-cells is 
organized. Cryptomeria, on the other hand, resembles Sequoia 
(Shaw, 1896; Lawson, 1904a) where five or six mother-cells 
are forrned. 
The megaspore mother-cell is divided about the time of 
pollination, i. e., the beginning of April. The division commences 
with the sinaptic stage and is evidently the reduction-division. 
Various stages of the first division are shown in figs. 36—40. In 
Taxodium , according to Coker (1903), two cells unequal in size 
are forrned as a result of the first division, but only the large 
lower one of these divides agaim Thus there are only three 
