4. Licea pusilla Schrader.

Sporangia scattered, gregarious, depressed-globose, sessile on a flattened base, dark brown, shining, .5–1 mm.; peridium thin, dark colored, translucent, dehiscent above by regular segments; spore-mass almost black, spores by transmitted light olivaceous brown, smooth, or nearly so, 15–17 µ.

Fries, l. c., makes this a physarum, and argues the case at length, evidently with such efficiency that he greatly impressed Rostafinski, who did not make it a physarum indeed, but actually gave it generic place and station of its own; a physarum may do without calcium in the capillitium perhaps, but not be entirely non-calcareous; so he writes Protoderma (first cover) and places the species number 1 on the long list of endosporous forms. Even in his 'Dodatek', or supplement, as we should say, he refers to the thing again, but only to correct the inflexional ending of the specific name; he writes Protoderma pusillum (Schrader) Rost!

Schweinitz reports the species for America and Morgan cites Schweinitz and reports it for Ohio, but we find it in no American collections.

B. ORCADELLACEÆ;

Sporangia distinct, minute, long stipitate, opening above by a distinct lid.

A single genus,—

Orcadella Wingate