Tiptoe through the Martian ice flowers: Mrs. Moore in Space by Gertrude L. Moore (London: Cassells, 1974)

If you haven't seen this it's worth a trip to abebooks.com. Although there is a new edition availble if you aren't fussy about such things.

Gertrude Moore drew these pictures in the 1960s and 1970s, when the likelihood of life on the solar planets had already been discounted. They are sharp, funny, especially satyrical. Painted in sepia tones, they are caricatures of vaguely humanoid, mermaidly creatures living ordinary lives on different planets.