“I had some of those! I dont remember the name or company, but mine were unpainted and were a solid pink color (like an erasor.) I got them while I was in grade school, and its been years since Ive even thought about them. They are long gone though, my mother sold them or game them away. But there are more animals in that collection! The ones that I can definately remember that are not pictured are: Styracosaurus, Monoclonius, Pterosaur, stegosaur, a Lambeosaur type duck bill, and an unknown 4 legged amphibian lookin critter.  See commented item ”