Third, fourth and fifth virial coefficients are reported for isotropic 2-dimensional fluids of hard convex molecules of elliptical and spherocylindrical shapes, covering a wide range of elongations. Similar results are also included for hard lines of unit length, to give values in the limit of extreme elongation. Comparison with recent results forB3andB4confirms their values. BothB4andB5become negative when the elongation is large. ForB4this occurs only at very extreme elongations, around 50:1 for ellipses, and an even larger value for spherocylinders, whileB5becomes negative at much lower elongations, around 6:1 for ellipses.