OF SOUTH AUSTRALIA. 
337 
Fig. 163 .—Haloplegma Preissii: a, portion of a 
frond; b, some of the vertical, 
anastomosing, central filaments, 
and the free, horizontal, superficial 
ramuli, showing their connection; 
c, ramulus with tetraspores; d , 
tetraspore; e, involucrated cluster 
of favellae; f, favella; g, spores. 
(After Harvey.) 
