skin - I have no idea about the clam, but it was probably used in some other article at some point in time. That's ok, it not that important.
"Hagar's" clothing is a little suspect because the artist did both her and Sarah, and handled draping really well. But I don't understand the bunching of her material on her shoulder. These two ladies are well done and did a sitting.
The rest of the figures - some have been taken from stock pictures and collaged together. The bull and the walker are stuck together but not convincingly. And you can see they used the same people in different places. I don't know if the "skeleton hand" on her shirt was purposeful or unintentional. Was Hagar's clothing a rush job creating puckers in her shoulder area or an artist that was doing it on purpose... can't say.