200 
Ridler . — The Fungus present in 
which, instead of being the usual dark-green colour, were brownish-black, 
and moreover the setae of these did not elongate. On examining sections 
of this material it was found that the whole of the sporophyte as well as 
the thallus contained very great quantities of fungal hyphae. A series 
of sections showed that very fine hyphae penetrate from the thallus to the 
Fig. 4. Longitudinal section through the thallus in the region of the foot. Fine hyphae are 
passing from the thallus into the foot, x 125. f, foot; tk., thallus; h., hyphae. 
Fig. 5. Longitudinal section through the seta of an infected sporogonium. Some of the 
cell-walls are partially destroyed, x 167. h., hyphae. 
base of the foot (Fig. 4), and enter, ramifying through the tissue of this 
organ. The hyphae then pass up into the seta, where they become very 
much wider, possibly owing to the rich store of accumulated food material 
