There is a fourth as well - Black-faced (L. caissara) - sort of an inverted Golden-headed but not kept anywhere outside South America that I'm aware of.
Black Lion Tamarins are one of my favourites; they're also kept at Chester, Belfast and Jersey, and a scattering of places across the rest of Europe. Also called Golden-rumped - they have a variable amount of golden fur on their backside!
There is a fourth as well - Black-faced (L. caissara) - sort of an inverted Golden-headed but not kept anywhere outside South America that I'm aware of.