ORDER PARENCHYMATA. 469 
THE SECOND ORDER OF INTESTINA. 
PARENCHYMATA 
COMPREHENDS those whose body is filled with a cellular 
substance, or even with a continuous parenchyma, in which 
we observe at most, instead of all alimentary organs, some 
ramified canals which distribute the nutriment, and which, in 
the majority, derive their origin from suckers, visible exter- 
nally. The ovaries are also enveloped in this parenchyma, 
or in this cellular substance. There is no abdominal cavity, 
nor intestine, properly so called, nor anus; and if we ex- 
cept some doubtful vestiges in the first family, nothing is 
distinguishable, which has the appearance of a nervous 
system. 
This order may be divided into four families. 
The first family, 
ACANTHOCEPHALA, Rud., 
Is attached to the intestines by a prominence, armed with 
recurved spines, which appears at the same time to serve as 
a proboscis. It only comprehends the genus 
ECHINORHYNCUS, Gm., 
Which has the body round, sometimes elongated, sometimes 
in the form of a sac, provided in front with a prominence like 
a proboscis, armed with small hooks, bent backwards, which 
can be protruded or retracted, by means of particular muscles. 
