mary fronds in everything but size, being rarely more than 1-4 lines long, 

 and not ^ line in width. The ceramidia are ovate, sessile on the midrib ; 

 the tetraspores triangularly parted, arranged in a single row at each side of 

 the midrib, near its summit. The colour is a brownish red or full-red, be- 

 coming darker in drying. The substance is membranous, not very soft, and 

 the frond imperfectly adheres to paper in drying. 



With the habit of a hypophyllous Deiesseria this Uttle plant 

 has the cehular structure and the fructification of Amansia, a 

 genus which includes several subtypes, if all the plants now re- 

 ferred to it be suffered to remain. T have not seen any specimens 

 of Sonder's Deiesseria Amansioides, which I doubtfully refer, 

 from his description, to our plant. Externally our plants seem 

 to agree, but Sonder describes the cellular structure to consist 

 of a single layer of empt^ hexagonal cells, covered by a layer of 

 superficial cellules. In my plant the lamina consists wholly of 

 hexagonal cells, which are filled with granular, bright-red endo- 

 chrome, liable, however, in the dried state, to be dissipated, when 

 they may sometimes appear empty. I find no trace of cortical 

 cellules ; the midrib alone is polysiphonous. 



Fig. 1. Amansia linearis, — the natural size. 2. A sporophyll or fruit-leaf- 

 let, bearing a ceramidium. 3. Spores from the ceramidium. 4. A sporophyll, 

 bearing tetraspores. 5. A tetraspore : — the latter figures variously magnified. 



