INTERNAL ANATOMY OF INSECTs. ENTE 
and nearly cylindrical; the duodenum shorter and 
thicker than the stomach, from which, as well as from 
the rectum, it is separated by a valve; the latter is cy- 
lindrical, and opens at the anus above the insertion of 
the vesicle that secretes the poison?. With regard to 
the dary system and its organs: The diver is of a 
pulpy granular consistence and of a brownish colour, 
fills the whole cavity of the trunk and abdomen, and 
serves as a bed for the other intestines. It is divided 
longitudinally into two portions, by the channel in which 
the heart reposes—its anterior part is formed into many 
irregular lobes, by the sinuosities of the trunk; at the 
other extremity it terminates in two acute ends, which 
enter the first joint of the tail; its surface presents a reti- 
cular appearance, the result of the approximation of poly- 
gonous lobuli ; its interior is a tissue of infinitely minute 
glands: in Scorpio occitanus there are about forty pyra- 
midal lobulz detached from each other, the summits of 
which, by their union, form bunches that have their ex- 
cretory canals, varying in number in different species, 
which convey the bile to the alimentary tube; in the 
above insect there are six pairs three in the trunk and 
three in the abdomen, and in S. Europeus a smaller num- 
ber?; these vessels run transversely from the liver, or ag- 
gregation of conglomerate glands, to the intestinal canal ¢ ; 
the bunches consist of an infinite number of spherical 
glands, generally filled with a brown thick fluid‘: be- 
sides the transverse vessels, from the base of the stomach 
aN. Dict. d Hist. Nat. xxx, 423—. Comp. Treviranus, Arachnid. 
t. 1.72 6. > Treviranus, Ibid. v. 
* N, Dict. d’ Hist. Nat. xxx. 421—, Comp. Treviran. Ibid. 
‘ N, Dict. d’ Hist. Nat. Ibid. 
