G. DYNAMENA. 
77 
cells simple, of a long oval form, united in groups of 
from three to six, but not coalescing with each other; 
ovaria of a pyramidical form ; height from one to two 
centimetres. 
Bay of Cadiz. 
FALCATED. 
22. Aglaopiienia Jalcata. Stem branching, and 
flexuous ; cells tubular, bulging, and imbricated ; ova- 
ria dispersed and oblong. 
European seas. 
DYNAMENA. 
Pl amt-like, cartilaginous, somewhat branching, 
garnished through the whole extent with cells in pairs 
and opposite. 
The Dynamenas are distinguished from the other 
genera of their order by their minuteness, their sessile 
and opposite cells, and their mode of ramification ; 
characters which are not found in the other Polypi- 
doms of this order. The cells are sometimes so 
transparent, that they can only be perceived by a 
strong magnifier, when they first leave the sea, and the 
polypi are yet alive. One is then tempted to imagine 
them naked polypi, fixed to their stem by a pedicle of 
greater or less length ; but we soon recognise the cell 
which serves for a retreat to the animalcula ; and in 
the Polypidoms preserved in collections these are often 
