ones somewhat cuneate below the furcations, all very obtuse or round-topped ; 
the margin throughout sharply and coarsely toothed, or in places ciliato- 
dentate. Cystocarpic fruit not known. Tetraspores of large sizeyand deep- 
red colour, immersed or half immersed in the cellules (chiefly) of the upper 
surface, and scattered abundantly over every part of the frond, appearing 
like dots under a pocket lens. ‘The colowr, when recent, is a full rosy-red, 
becoming duller and more purple in the herbarium. The substance is very 
firmly membranous or somewhat cartilaginous; and when dry the frond 
shrinks considerably, and very imperfectly adheres to paper. The super- 
ficial cellules are of larger size than in other species of Rhodophyllis, and in 
a single row; those of the medullary stratum are smaller, more closely 
packed and filled with granular coloured matter. 
Tam not at all sure that the plant here figured is correctly 
referred to 2hodophyllis, in which genus I place it provisionally, 
until the discovery of the cystocarps enables us to determine its 
true affinities. The structure of the frond does not quite agree 
with that of Rhodophyllis, and perhaps agrees better with that 
of Calliblepharis. he tetrasporic fruit would answer equally 
well for either of these genera. In habit there is a greater resem- 
blance to Rhodophyllis, and this has induced me to place it in 
that genus. ‘Taking into consideration the structure of the 
frond, and the remarkably large and distantly scattered tetra- 
spores, | had at one time supposed it might be the type of a 
peculiar genus; but without a knowledge of the cystocarps it 
would be premature so to consider it. 
Fig. 1.” RHODOPHYLLIS ? NITOPHYLLOIDES,—the natural size. 2. Small por- 
tion of a lacinia, with scattered tetraspores im situ. 3. Section through a 
portion of the same. 4. Tetraspores :—all magnified. 
