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 antennaj, 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 inverteb rated 

 animals ; and those of MM. Audouin, and Milne Edwards, on the 

 Annelida. 



