Multiplexing signals

I don't know if I'm going down the right path here. I'm an electronics
hobbyist with no formal training.

I've got an Arduino board and I want to drive an 8x8 LED matrix. The
thing is there are 24 pins on the matrix.

Figured out that with six bits I could control all 24 lines if I could
multiplex it somehow.

I believe what I'm looking for is probably in a 74LS type chip but what
I've run across so far takes eight bits and shoots out a serial signal.
Not what I need at all, I need something with a bit of smarts.



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