how to invert scrolling

I have an older MacBook Pro (about 5 years) that I just upgraded to OS Lion.

Most of the changes between this and Snow Leapord are pretty easy to get used to.

However, Can someone please tell me how to invert scrolling? It now acts like it's an iPad or iPhone, but I'm using a freaking mouse. When I scroll the wheel down (or use the trackpad), I would expect the window to scroll down ("technically" the document goes up; but the bar on the right goes down).

Someone with a newer MBP gave me this screenshot of them selecting "Scroll direction: natural" , and that fixed it.

Clearly you can see that I do not have such an option:

All "Use two finger to scroll" does is turn off the feature completely.

PLEASE HELP!!!!!!

Thanks,

~Jerry