SUPPLEMENT 
ON THE 
FOURTH AND LAST GRAND DIVISION 
OF 
ANIMALS. 
THE ZOOPHYTES. 
UNDER this complex denomination, which signifies animal 
plants, we comprehend those animals, which, not being 
symmetrical, are not capable of being divided into two 
similar sides, situated at the right and left of a secant plane, 
or imaginary line, which should pass through the length of the 
animal, all the parts of which might be referred to this plane. 
But, on the contrary, in the animals in question, the parts are 
disposed, in a manner more or less regular, round a common 
point, taken as a centre, or the axis of the body. This has 
caused them sometimes to be compared to flowers, of which 
all the parts have also this disposition. From this, Pallas 
has derived the denomination of centrina, which he has 
given to one division of these animals, which has been 
changed to radiata, radiated animals, and actinozoaria, by 
some writers. 
