[U]

Leidy, “Fauna and Flora within Living Animals,” in “Smithsonian Contributions to Knowledge.”

[V]

Murie, in “Monthly Microscopical Journal” (1872), vii. p. 149.

[W]

See genus Mycetophagus, “Stephen’s Manual Brit. Coleopt.” p. 132.

[X]

Sowerby’s “Fungi,” plates 289 and 387, fig. 6.

[Y]

Schacht, “Fungous Threads in the Cells of Plants,” in Pringsheim’s “Jahrbuch.” Berlin, 1863.