OF SOUTH AUSTRALIA. 
345 
6 cm. long, distichous, with a pyramidal outline, the lowest branches being 
longest, the upper gradually shorter, main stem undivided, closely pin- 
nated throughout with alternate, horizontal lateral branches. Branches 
bare of pinnulae at base for nearly one-third of length. Every part of 
the frond is closely whorled with minute quadrifarious ramelli, the whorls 
nearly touching. The branches, pinnae, and pinnules are all opaque, being 
corticated with a layer of cellules, which is thickest in the oldest parts, 
Tetrasporailgia globose, sessile near the tips of the ramelli. Colour deep 
red. Substance rather cartilaginous, soft. Adheres to paper. 
Victoria (Warrnambool). 
Muellerena (?) Agardhiana (Harv.) De Toni. 
= Crouania Agardhiana Harvey. 
Frond cartilaginous, thickly corticated, opaque, much branched ; 
branches and ramuli alternate, repeatedly divided, very patent, whorled at 
the nodes with minute, dichotomo-multifid, four-ranked, articulated, obtuse 
ramelli; favellae quaternate, at the apices of short branches. 
Attachment a small disc. Frond 12 cm. to 20 cm. long, about 1 mm. 
thick, coated with a layer of peripheric cells, in the younger in a single 
row, in the older in three or four rows, surrounding the monosiphonous, 
articulated axial tube. The frond is much branched in an irregular manner, 
branches and ramuli spreading at wide angles. The internodes throughout 
the frond are about one and a half to two times as long asi broad. The 
nodes are whorled with quaternate ramelli. These ramelli are minute 
with blunt apices and three to four times dichotomous. Favellae mostly 
four together, at ends of the ramuli, each containing several angular spores 
