The apodeme, of course, is moulted with the integuments of the mouth.
apodeme: an inwardly directed process to which a muscle is attached.
Endosternite: that part of the apodeme arising from the intersternal membrane.
The nerve does not enter the bluntly-pointed basal end of the common eye, but on one side of the apodeme.
The apodeme, at its base or point of origin, is unusually broad and flat.