FOURTH AND LAST GRAND DIVISION 
OF 
ANIMALS. 
THE ZOOPHYTES, OR ANIMALIA RADIATA, 
COMPREHEND a considerable number of beings whose or- 
ganization, always manifestly more simple than that of the 
three preceding divisions, also exhibits more gradations, and 
seems to be constant only in this point, that the parts are 
disposed round an axis, and on two or several radii, or on two 
or several lines, proceeding from one pole to the other. ‘The 
intestinal worms themselves, have at least two tendinous 
lines, or two nervous filaments, proceeding from a collar 
around their mouth. Several among them have four suckers 
round a prominence, in the form of a proboscis ; in a word, in 
spite of some irregularities, and with very few exceptions, 
(such as the planaria, and most of the infusoria) we always 
discover some traces of the radiating form, very much marked 
in the great majority of these animals, and especially in the 
asteriz, the echini, the acalephe, and the innumerable polypi. 
The nervous system is never very evident; when any 
traces of it have been at all discoverable, they were also dis- 
posed in radii; but most frequently there is not the slightest 
appearance of it. 
Nor is there ever any true system of circulation. The 
a 
