OF SOUTH AUSTRALIA. 
239 
4. Frond filiform, not compressed. Central 
tube in the axis. Pectinate-ciliate, much 
branched, above penicillate. Cystocarps 
globose, stipitate, replacing simple cilia 
or pinnules Asparagopsis 
Montagne. 
LEPTOPIiYLLIS J. Agardh. 
Frond membranous, flat, thin, linear, distichously pinnatifid, formed of 
large polygonal granuliferous internal cells, corticated externally by 
minute-coloured cellules. Cystocarps ovoid, terminating shortened pinnules, 
containing a tuft of pear-shaped spores. Sori oblong or linear lying within 
the margin; tetrasporangia very numerous, rounded, cruciately (not 
triangularly as Harvey) divided. 
Lepiopliyllis conferta (R. Br.) J. Agardh. 
The single species. Height 10 cm. to 15 cm., width 2 mm. to 4 mm. 
Margin serrulate. Colour rose-red. 
Victoria and Tasmania. 
PTILONIA J. Agardh. 
Frond linear, flat, or two-edged, decompound-pinnate, serrate-dentate, 
subcostate. Three strata of cells, the inner of longitudinal branching 
threads, the intermediate of angular-roundish cells, the cortical of smaller, 
rounded cells. Cystocarps globose, stipitate, borne on the margin of the 
frond. Sori of tetrasporangia irregular, lying within the margin as in 
Leptophyllis. (I have only seen the sori in one specimen. The tetra- 
sporangia seemed to me to be in tetrads but they were not clearly divided. 
This is the only record of the sori of Ptilonia.) 
