The stolen object is a globe; the object presented in exchange is an elliptical conoid studded with angular projections along the edge of the base.
"The Life of the Spider"
J. Henri Fabre
It is an obtuse conoid, closed with a star-shaped disk.
"The Life of the Spider"
J. Henri Fabre
Apart from its pillars, the egg-pocket is an inverted conoid, reminding us of the work of the Silky Epeira.
"The Life of the Spider"
J. Henri Fabre