This is a digitally cleaned up version of the original illustration. There’s a matte version also (that is how I gave it to my friend for her birthday).
Visually, I wonder which version is better, and why… I don’t mean in terms of quality of the image file you see, but whether the cropped (by the matting) or uncropped one is better.
I also had in the back of my a head a book I had as a kid, After Man: A Zoology of the Future. I think these are marsupalian, with some raccoon-like and some lemur-like characteristics.