Meridians: Complex curves converging at the poles. A sine function is used for y, but the meridians are not sine curves.
Parallels: Unequally spaced straight lines.
Symmetry: About the Equator and the central meridian.
This is an equal-area projection. Scale is true along the fixed standard parallels at 35º, and 0.9 true along the Equator. This projection is neither conformal nor equidistant.