143 
1917-18.] Phycomycetous Fungi. 
not point conclusively to the Saprolegniacese. The decomposition of the 
host may have been effected under sub- aqueous conditions ; if so, its habit 
would accord with those of modern Saprolegniacese, among which there are 
none of terrestrial habits. It is proposed to assign the non-committal 
generic name Palceomyces to the organism (Seward, 10, p. 222), reserving 
the name “ bacilloides ” for this particular species. 
Fig. 8. x 800. 
Summary of Characteristics of Palceomyces bacilloides. 
Horizon . — Lower Coal Measures. 
Habit. — Endophytic, probably saprophytic. Found in parenchymatous 
cells of leaf-bases of a species of Lepidodendron — probably L. fuliginosus. 
Mycelium . — Characterised by great variation in thickness from less 
than 1/x up to 4^. Change in thickness may be gradual or abrupt. 
Branching monopodial. 
Some of thinnest hyphse, after traversing a few cells, appeared to have 
broken up into fragments ; the growth of the fragments appeared to have 
proceeded after separation, giving to them the appearance of a colony of 
bacteria of the genus bacillus (or bacterium). There is therefore a suggestion 
of pleomorphism in the life-cycle of the fungus. 
