RADIATA. 613 



and composilion which may be traced in them, with the 

 well known genera of zoophytes, the change would not be 

 of advantage. 



The portion of the animal exhibiting the tentacula, head 

 and body, 'continuously connected, is termed the Polypus ; 

 and the substance, whether it be fleshy, membranaceous, 

 crustaceous, or testaceous, to which the body adheres, is 

 denominated the Coral. 



Order I. — Caiinosa. 



Polypi, connected with a fleshy substance, and furnished 

 with eight rays. 



The animals of this order seem much more complicated 

 than those which follow, and bear a close resemblance to 

 Actinia, and especially Zoanthus They are furnished 

 with a stomach, intestines, and ovaria. 



1st Tribe. 



Aggregated animals, free and floating in the water. The 

 fleshy coral is supported by a loose bony axis. In one ge- 

 nus (Veretillum), Cuvier found the stomach separating 

 into fine tubes, which, after entering the fleshy substance of 

 the coral, reunited with other tubes from the stomachs of 

 the neighbouring polypi *. The following genera belong 

 to the group : Pennatula, Veretillum, Funiculina, Renilla, 

 Virgularia, and Umbellularia. In the remaining tribes, the 

 compound mass is always permanently attached to other bo- 

 dies. 



% Tribe. 



Aggregated animal fixed. The coral is fleshy, convex, 

 or lobed. The polypi have the central mouth surrounded 

 with eight pectinated tentacula. The viscera of each poly- 

 pus is enclosed in a double tunic, the inner one of which is 



• Lemons, vol. iv. p. 146. 



