FOURTH 
GREAT DIVISION 
ANIMAL KINGDOM. 
ANIMALIA RADIATA. 
Tue Rapiatep AnimAus, Zoopuyta, or ZoopHytTEs* (a), as they 
are termed, include a number of beings whose organization, always 
evidently more simple than that of the three preceding divisions, also 
presents a greater variety of ‘degrees than is observed in either of 
them, and seems to agree in but one point, viz. their parts are ar- 
ranged round an axis, and on one or several radii, or on one or 
several lines extending from one pole to the other. Even the En- 
tozoa or Intestinal Worms have at least two tendinous lines, or 
two nervous threads proceeding from a collar round the mouth, and 
several of them have four suckers situated round a probosciform 
elevation. In a word, netwithstanding some irregularities, and 
some very few exceptions—those of the Planaria and most of the 
Infusoria—traces of the radiating form are always to be found, 
which are strongly marked in the greater number, and particularly 
in Asterias, Echinus, the Acalepha, and the innumerable host of the 
Polypi. 
* Neither of these denominations should be construed literally. There are some 
genera in this division in which the radiation is but slightly marked, or even totally 
wanting, and it is only among the Polypi that we find that constancy and form of 
flowers which has caused them to receive the name of Zoophytes. These appella- 
tions, however, indicate our having reached the lowest part of the animal series, 
and that we have arrived at beings, most of which remind us more or less of the 
vegetable kingdom, even in their external forms—it is in this sense that I employ 
them. 
{i> (a) We here return to Baron Cuvier ;—the portion of the work written by 
M. Latreille, which commenced with the Crustacea, in our third volume, having ter- 
minated with the Dipterous Insects. —ENG. Ep. 
