It, it, The three lobes of the lower lip of the rotate corolla.
The first of the series (which appears to have no predecessor) single-lobed; the other four composed of two lobes, each subtriangular in section.
Hinds believe that the paired piercers are the inner lobes of the maxillae, and the unpaired piercer the left mandible, the right mandible being absent.
We find in the Babylonian-Assyrian omen-texts special designations for the three main lobes of the sheep's liver - the lobus dexter, the lobus sinister and the lobus caudatus; the first-named being called "the right wing of the liver," the second "the left wing of the liver," and the third "the middle of the liver."
The depression separating the two lower lobes from the lobus caudatus, and known as the porta hepatis, was appropriately designated as the "crucible" of the liver.