G. AGLAOPHENIA. 
71 
plants ; they are almost always found attached by long 
and numerous filaments to the solid sands or rocks 
of the Mediterranean and European oceans ; they 
seem to prefer deep waters. 
ANTENNINE. 
1. Nemertesia antennina . Ramifications verti- 
ciliated, simple and setaceous; stem simple or very 
little branched. 
European seas 0 
N. B, It is a rare thing to find this species 
branched ; and when so found, the number of branches 
is confined to one or two, seldom more. 
JANINE, 
2. Nemertesia Janini . Stem a little branching ; 
verticils very distant from each other; slender bristles, 
very long.— Plate 4. fig. 3. a. B. C. 
Bay of Cadiz. 
BRANCHING. 
3. Nemertesia ramosa . Stems branching ; ver- 
ticils approximate. 
European seas. 
AGLAOPHENIA. 
Plant-like and homy ; furnished through the 
whole length, and on the same side, with axillary or 
isolated cells. 
