ratlier deepening in drying. Substance rigid. It scarcely adheres to jjaper 

 in drying. 



The specific name scoparia is given to this species partly be- 

 cause its tufted branches, crowded with straight and rigid ramuli 

 do resemble brooms ; and partly because the whole aspect of the 

 plant, colour alone excepted, is that of Sphacelaria scoparia,—di 

 northern species, much like the Australian S. panicuJata. From 

 all other known Ballia this differs in the alternate insertion of 

 the ramuli, and in the very imperfectly pinnate condition of the 

 penultimate branches. The fruit is scarcely known, bat so far as 

 known it agrees with that of the other species ; and the sub- 

 stance and colour of the frond and the clothino; of the main fila- 

 nients are those of Ballia caUitricha. It is the least beautiful 

 of the genus. 



Fig. 1. Ballia scoparia, — the natvral size. 2. A penultinate branch. 3. 

 Section of the stem, with its stupose iibres. 4. One of the fibres. 5. Ha- 

 muli, with au involucre. 6. Apex of a ramulus. 7. Some of the iuvo- 

 lucral filaments : — magnijied. 



