Curzseman.—Deseription of a New species of Hymenophyllum. 881 
and H. moorei, from Lord Howe's Island, are closely related species. 
Trichomanes armstrongii, from the Canterbury Alps, has precisely the same 
habit, and but for the thickened margins of the frond, could hardly be 
distinguished in the barren state. It has, however, the true sori of a 
Trichomanes, and when seen in fructification, it is impossible to confound 
the two plants. 
