OP SOUTH AUSTRALIA. 
377 
acuminate, subfalcate, angular at the base. Tetrasporangia in dense groups 
of scattered fertile sori. Substance firm. Colour purple below, paler 
above. 
Victoria (Port Phillip). 
Grateloupia filicina (Wulf.) C. Agardh. 
Frond to 25 cm. long, compressed-plane, irregularly pinnate and pro- 
liferous from the disc; pinnae at base narrow, linear, acuminate; below 
longer and pinnulate, above simple. Cysto, carps immersed in the pinnae. 
Tetraspores immersed in the pinnules, often grouped together. Colour 
purple or violet. Substance membranaceous. 
East Coast of Australia and Tasmania, Atlantic and Mediterranean 
Oceans. 
Fig. 189. — Grateloupia filicina. 
PACHYMENIA J. Agardh. 
Frond flat, foliaceous, very thick, entire or widely lacinate, or fairly ' 
regularly dichotomous; composed of articulate filaments, the inner ones 
elongate, sparsely branched, very dense, intertwined, denser in the centre ; 
the intermediate ones a little looser, shorter, anastomosing; the cortical 
filaments vertical and fasciculate, very long, solidly united with mucus. 
Cystocarps scattered over the frond, minute, often in many rows in 
depressions of the cortical layer, with filaments issuing from the cavities. 
Tetrasporangia immersed in the cortical layer, sparse, elongate, cruciate. 
Pachymenia apoda J. Agardh. 
Frond 4 cm. to 9 cm. long, sessile or shortly stipitate, obovate rotund 
with one lobe or a second rising from just within the margin, or sometimes' 
lobate, with secondary lobes, contracted below into short stipes the adult 
ones fairly widely laciniate, more or less regular. Tetrasporangia oblon- 
cruciate. 
South Coast of Australia, Tasmania. 
