OF SOUTH AUSTRALIA. 
361 
Fig. 180 . — Ptilocladia pulchra: a, plant; b, cross- 
section through a branch, showing a 
section of the central axile filament, 
the peripheric ramelli and some tetra- 
spores in situ; c, apices of a ramellus, 
with an attached tetraspore; d, 
eternal view of one of the ultimate 
divisions of the frond containing a 
pair of favella. (After Harvey.) 
