The Envelope of the lines connecting corresponding points on the Jacobian Curve and Steinerian Curve. The Cayleyian curve of a net of curves of order has the same Genus (Curve) as the Jacobian Curve and Steinerian Curve and, in general, the class .
References
Coolidge, J. L. A Treatise on Algebraic Plane Curves. New York: Dover, p. 150, 1959.