224 Farmer and Reeves. — On Pellia epipkylla , Nees. 
divided cells as would support the view of a simultaneous 
division having taken place. 
It is impossible to avoid being struck by the differences 
existing between the processes accompanying nuclear division 
in the spores of this Liverwort, and those obtaining in certain 
other plants. We reserve, however, the consideration of these 
for a future paper, contenting ourselves in this place with 
a description of the facts as they may be observed in Pellia 
epiphylla . 
EXPLANATION OF FIGURES IN PLATE XIV. 
Illustrating Messrs. Farmer and Reeves’ paper on the Occurrence of Centrospheres 
in Pellia epiphylla , Nees. 
All the figures refer to Pellia , and are drawn from spores germinating within the 
sporogonium. 
Fig. i. Mature spore with the nucleus in the resting condition. 
Fig. 2. Nucleus becoming elliptical. The centrospheres at the two poles. 
The chromatin aggregated in an equatorial belt. 
Fig. 3 and 4. Nucleus assuming an asymmetrical shape. The centrospheres not 
diametrically opposed. 
Fig. 5. A polar view of the centrosphere and the radiations. 
Fig. 6 and 7. Nucleus in which chromatin fibrils are becoming clear. 
Fig. 8. Later stage of karyokinesis. 
Fig. 9. Chromosomes, eight in number, seen in polar view. 
Fig. 10. Daughter-nuclei in process of reformation. A marked cell plate. 
Fig. 11. Spore which has divided into three cells, in each of which stages of 
nuclear division are shown. 
