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anatomy of the mole-cricket. 
The portion of the intestine below the orifice of the hepatic 
duct, as it may be called, appears to be externally traversed 
in a longitudinal direction by several rows of small convex 
eminences resembling beads ; these are the outer surfaces of 
t 
so many corresponding internal sinuses, which are probably 
formed as the similar sinuses in the large intestines of man-, 
and many other animals, by a pecularity in the disposition 
of the fibres of the muscular coat. 
Near the termination of the intestine are two orifices, one 
on each side, communicating each with a duct which soon 
swells out into a vesicular bag ; these bags may probably be 
glands that secrete the fetid matter which the insect ejects 
from the anus when irritated. In one instance I found, on 
the site of the orifices above-mentioned, two small bodies 
about the size of a pin's head, of a dark colour, and to the 
naked eye of a spherical form ; my surprize was consider- 
able when upon observing them with a magnifying lens, I 
perceived that they exactly resembled a crystallized rosette 
of brown pearl-spar. Upon being removed and submitted 
to the requisite experiments, they proved to be of consider- 
•able hardness, sparry in their structure, and insoluble either 
in boiling water or alcohol ; but they were dissolved with 
rapid efferverence in diluted muriatic acid. These calculous 
concretions were probably the result of diseased action in the 
vesicular glands round the orifices of the excretory ducts of 
which they had been deposited. 
The blood. Upon wounding the animal in almost any part 
of the body, even in cutting off a portion of the caudal an- 
tenna, there oozes out a very clear thin fluid of a bright 
honey-yellow colour; having sensibly alkaline properties, 
