PARENCHYMATA. 361 
ORDER II. 
PARENCHYMATA. 
The second order of the Entozoa comprises those species 
in which the body is filled with a cellular substance or even 
with a continuous parenchyma, the only alimentary organ it 
contains being ramified canals, which distribute nourishment 
to its different points, and which, in most of them, originate 
from suckers visible externally. The ovaries are also envel- 
oped in this parenchyma or that cellulosity. “There is no ab- 
dominal cavity, nor intestine properly so called ; the anus is 
wanting, and if we except some equivocal vestiges in the first 
families, there is nothing to be found which bears a resem- 
blance to nerves. 
We may divide this order into four families. 
FAMILY I. 
ACANTHOCEPHALA. 
The Parenchymata of this family attach themselves to the 
intestines by a prominence armed with recurved spines, 
which also appears to act as a proboscis. They form the sin- 
gle genus 
EcurNoruyncuus, Gm. 
Where the body is round, sometimes elongated, and sometimes in 
the form of a sac, provided anteriorly with a prominence in the 
Voi. 1V.—2 V 
