In the specimen figured, the longitudinal diameter of the mouth, including the labrum, was 5/400th of an inch.
The labrum is considered by some authorities to be the hypopharynx.
The scape, labrum, mandibles and palpi ferruginous; the clypeus widely emarginate anteriorly.
There are teeth on each side of the central notch of the labrum.
Mouth, as in E. Kingii, excepting that there are only three teeth on each side of the notch (which is deeper) on the labrum.
Yet this labrum is a large marble vessel seven feet in diameter.
A corneous piece which covers the instruments of suction above, representing the labrum in a perfect mouth.
Labial lobes large, oval, contiguous with one another, at the tip of the labrum.
Mouth: on the crest of the labrum there are two teeth on each side of the central notch.
The calidarium had the labrum at one end, and the alveus was in one side of the room.
labrum la·brum (lā'brəm)
n. pl. la·bra (-brə)
A lip-shaped anatomical edge, rim, or structure.