Here is some information about them to help clarify the categories. You will also have information about how these two groups of Monkeys are the same.
The Proboscis Monkey is also called the Monyet Belanda Monkey, which means the long nosed Monkey. It belongs to the Old World classification. In the Egyptian Culture they were worshipped as a very unique animal and believed to be special to the gods.
Amazing photo gallery about monkeys. Proboscis Monkey and His Unique Nose.
There are many names that you may hear the Pygmy Marmoset called by. They are known as the Pocket Monkey, Little Lion, and the Dwarf Monkey.
Amazing photo gallery about monkeys. Mandrill On Rocks.