272 EXPLANATION OF THE PLATES. 
Fig. 7. A cistule of the same, cut transversely, and very 
much magnified. 
a. Fibrous fungosity, supporting the seminules. 
b. Seminules escaped from the cistule. ‘ 
Fig. 8. Spheeria stigma. Sarcothalamee. Cut vertically 
as it grows within the bark of the hazel-nut-tree, and very 
much magnified. A S/T 
a. Partition dividing the spherule into two cells. 
Fig. 9. Physarum. Fungi. Several plants as they grow 
on dead timber, magnified. 
a. Peridium cracked at top, showing the internal cells 
containing the seminules. 
Fig. 10. Puccinia rose. Protomyct. A group of plants 
as they grow on the under surface of the leaves of the 
rose-tree; very much magnified. 
a. Pedicell transparent, swelled out at bottom. 
b. Peridium black, oblong, pointed, many-celled, par- 
titions transverse. 
c. A very young plant. 
d. An old plant, the peridium of which is torn, and the 
seminules have escaped. 
Fig.11. Ceramium polymorphum. Thalassiophyte. Ex- 
tremity of a branch very much magnified. 
a. Conceptacles globular, solitary, sessile, just under 
the tip. 
b. Small pappus on the tip of the conceptacles. 
c. Extremity of a branch, extending beyond the con- 
ceptacle. 
d. Barren branch, terminated by two small lanceolate 
frondilles. 
Fig. 12. Girardia atropurpurea. Hydrophyte. Parts of 
the plants, as they float in water, very much magnified. 
a. A young filament, having only a dark line, without 
any appearance of cells. 
b. A filament in a more advanced state of growth, in 
which the partitions begin to be visible, with a small rec- 
tangular seminule in each. 
c. A filament still more advanced in growth, in which 
the seminules have changed their position. 
d. A filament containing two seminules in each cell. 
e. A filament in which the two seminules have changed 
position. 
jf. A filament in which the cells are become obliterated, ° 
and being ruptured, let the seminules escape. 
