and what exists of an dztermediate, composed wholly of closely interlacing 
and anastomosing filaments; the cortical of vertically seriated cellules, in 
many rows. ‘The colour is a deep purplish-red; the surface glossy, and 
both preserved in drying. ‘The sudstance is thickish, very tough, rigid, 
horny when dry, in which state the frond does not in the least adhere to 
paper. 
This plant bears so close a resemblance externally to our 
Acropeltis Phyllophora (Plate CCLXXXIII.), that I formerly 
confounded it with that species, and may very probably have 
erroneously distributed it, under that name, among my Austra- 
han duplicates. Both plants were gathered at the same place 
and time, and dried and stowed away together. It was not 
until I commenced dissections for preparing a plate of the Acro- 
pettis, that I noticed the confusion. A glance at the section 
(fig. 3 in our present Plate) and comparison with the sections 
(figs. 3, 5, Plate CCLXXXIII.) of Acropeltis Phyllophora, will 
show the differences in cellular structure, which remove the pre- 
sent plant, generically, from Acropeltis. In now referring it to 
Cryptonema, | must be understood to do so provisionally, until 
the discovery of its fruit enable us to assign it its proper place 
in the system. 
Fig. 1. CRYPTONEMIA? DECIPIENS,—the natural size. 2. Apices of a seg- 
ment, with young sori. 3. Section through the frond :—magnified. 
