1899] CURRENT LITERATURE 495 
by transferring vigorous young mycelia to thin shavings of horn has observed 
the infection of the latter. 
It thus becomes evident that the spores of Omygena pass through the 
body of an animal in nature, and, as might be expected from this, extract of 
the animal’s dung affords a suitable food medium to re-start the growth on 
horn. Probably the cattle lick the Oxygena spores from their own or each 
other’s hides, hoofs, horns, etc., and this may explain why the fungus is 
so rarely observed on the living animal: it is recorded from such in at least 
position of Onygena, the experimental cultures, growth measures, and the 
histology, the reader is referred to the full paper, which is illustrated by 
plates and numerous drawings.— H. M. WARD. 
