8 
CLASS ANNELIDA. 
each oar, and vary much in form and consistence, sometimes 
forming true spines, sometimes fine and flexible hairs, often 
denticulated, barbed, &c.* 3. The cirri, or fleshy filaments 
adherent either above or beneath the feet. 
As to their organs of the senses, the annelida of the first two 
orders, have generally, at the head, tentacula, or filaments, to 
which, notwithstanding their fleshy consistence, some moderns 
give the name of antennae, and many genera of the second 
and third have black and shining points, which, with some 
reason, have been regarded as eyes. The organization of 
their mouth varies greatly. 
* See, on this subject, the memoirs of M. Savigny, on the invertebrated 
animals; and those of MM. Audouin, and Milne Edwards, on the 
Annelida. 
