MALENTOZOA. CIREIPEDIA. 



Soft, symmetrical, articulated animals, enveloped 

 in a mantle and sliell ; with the body reversed, at- 

 tenuated at the upper or posterior end, and termi- 

 nated by a somewhat articulated tail, furnished on 

 either side with long, horny, jointed, and ciliated 

 cirri ; and having a complete double circulation, 

 with white blood ; branchial respiration ; an intes- 

 tinal canal with two apertures ; and a nervous system 

 composed of a double series of ganglia. The shell, 

 in some, formed of five distinct, contiguous or im- 

 bricated pieces, constituting a conical coronary 

 body, closed below by a membrane or calcareous 

 plate, open above, with four opercular pieces in the 

 aperture ; in others, of several pieces disposed in 

 two lateral plates, with a medial narrow piece, and 

 a basal fleshy peduncle. 



Genus LepaSy Linnaeus. Part of MaJcntozoa, Blain- 

 ville. Cirrhipoda, Lamarck, Cuvier. MakaKos soft ; 

 Evro/ioff, divided or jointed ; Zwoi^, animal. 



