This little kitty is a Smilodon, more commonly referred to as a Saber-toothed Tiger.
He was manufactured by Marx sometime in the sixties and was originally available in boxed or bagged sets of prehistoric animals. Any boy who grew up in the sixties, seventies and eighties had tons of little plastic dinosaurs all over the place, and I imagine future excavations of our civilization will ironically yield tons of toy dinosaurs and other prehistoric creatures.
The Sabre-Toothed Tiger was always my favorite prehistoric animal, next to old T-Rex himself. I mean, who wouldn't marvel at a giant feline with fangs the size of butcher knives!
Toys like these also remind me of the "good old days" when we thought dinosaurs walked upright, dragging their snakelike tails, lumbering like giant slow lizards. I recall hours and hours of play in the house and in the yard with handfuls of colorful plastic creatures. My era was a heyday for cheap plastic toys - army men, knights, fantasy creatures, dinosaurs, aliens - we had it all. If you can even find a set of cheap plastic toys nowadays you're lucky if they're army men or dinosaurs, and they have little charm after having been cast and recast and copied fifty thousand generations after the original molds.
Also, kids today seem to prefer the squishy rubber toy frogs and bugs and stuff which were solid or hard plastic in my day. Sheesh - kids!
"I want tuna, I want liver, I want a Mastadon, please deliver!"
No, he didn't roll over for a tummy rub - I'm just showing his markings which read "Smilodon" and "9' Long"
See, in my day toys even taught you something!