The cellular s/rwetwre of the frond in this species, and especi- 
ally that of the lesser branches and ramuli, is very similar to the 
structure of the same parts in Rytiphlea, so much so that at one 
time I supposed this plant to be nearly allied to 2. e/ata, and 
to differ chiefly in colour and greater opacity of surface. But 
the structure of the ceramidium and the fusiform ramuli, both 
point to Chondria as the true affinity. In Chondria it will not 
need to be compared with any known species, the substance and 
general aspect are so different. The blood-red colour, consider- 
ably preserved in drying, is similar to that of C. clavata, a 
species otherwise very unlike it. 
Fig. 1. Cuonpria RuBRA,—¢he natural size. 2. Cross section of a branch. 
3. Some ramuli, bearing ceramidia. 4. Section through a ceramidium. 
5. Spores,—magnified. 
