Here are my attempts at filling in missing MM1 combat icons. At least the skunk looks good.
Sheet A: Sea Reptile (Elasmosaurus, Mosasaurus), Giant Sea Horse, Sea Lion, iant Skunk.
Sheet B: Hippocampus, Giraffe (Herd Animal), Bison, Triton.
Sheet C: Peryton.
I think part of the hippocampus is a Hans' horse, and the triton is a merman with legs alterred (unknown artist).