The type of effective cross section in terms of an effective refractive index for a wave surface k and ray surface s in a plane of incidence for a transverse wave being polarized in a plane of incidence kxy, sxy and normally to a plane of incidence kz, sz. A line that touches a beam surface (red and violet contours) determines the direction of beam splitting during internal conical refraction. The line that touches the wave surface (black and green contours) determines the directions of the incoming connecting rays under external conical refraction. Here during ray surface construction its real meaning was multiplied by 3. The crystalline medium has double anisotropy in accordance with (25)