79 
The stomachs of rapacious insects, like those of 
the carnivorous mammalia, are more simple and less 
firm of texture than of those which devour vegetables. 
“ In the orthoptera, e. g. the grylli, we find, in the 
larva, as well as in the perfect insect, a short and 
strait intestinal canal: but the cesophagus first ex- 
pands into a crop-like cavity, which is followed by 
a small, roundish, muscular stomach, plentifully fur- 
nished with horny teeth on its internal surface: 
next comes a circle of little caca, or, in some spe- 
cies, a heart-shaped expansion with folds at its inner 
and upper part; and, lastly, a narrow, gut-like sto- 
mach. On account of this complicated structure, 
which is pretty closely imitated in the ruminating 
mammalia, the power of ruminating has been ascribed 
to these insects ‘.”. The organization is more simple 
in the neuroptera, in which the organs of mastica- 
tion are powerful, and their habits rapacious. “ The 
coleoptera,” says Mr. Gore, “ may be arranged in 
two divisions, according to the presence or absence 
of a gizzard.” 
Of infusory animals and zoophytes some appear 
to imbibe their liquid food into a hollow body, which 
is all stomach, through pores in all parts of the body. 
Some, called rzxostoma, imbibe in a similar man- 
ner, through a distinct portion of their frame. Some 
of the mollusca, consisting of merely hollow sacs, 
receive and evacuate the substance of nutriment 
and excrement by the same single aperture. Many 
discharge superfluous matter by a distinct aperture, 
t Carus, p. 27. 
