Yet another toy that Mother's everywhere threw away by the bucket-full.
Sinclair Dinoland Waxy-Plastic Dinosaurs were distributed all over the country in the 1960s and 70s to promote Sinclair gas stations which used a brontosaurus as their mascot (or if you are a purist - the Apatosaurus). These toys were produced in front of your eyes with portable injection-molding machines that traveled the country to parking lots and proto-shopping malls of the day. The slippery or "waxy-plastic" is likely the result of using a soft plastic with a low-melting point to safely produce the figures with the "Mold-a-Rama" portable machine in any condition. (Oh yes, the days when -rama was used as a suffix, like the ever popular -a go-go as in "Whiskey A Go-Go").