OF SOUTH AUSTRALIA. 
371 
Fig. 187. — Thamnocarpus penicillatus: a, plant, growing 
on a vesicle of Macrocystis ; b, frustule 
of a branch, bearing one of the byssoid 
pencilled ramuli; c, a ramellus from the 
same; d, transverse section of a branch; 
e, longitudinal section of same. (After 
Harvey.) 
