October Sketch 25- A Skull

So, some reviews of some of my earlier pictures prompted me to revisit them, but I was unsatisfied with how they were turning out, so I decided to go back and better re-familiarize myself with the shapes of the face. The process is ongoing, but in the hopes of gaining more feed back I decided to freehand this skull as a milestone to try and see what I can do after a few hours of study.  I do feel that I have a better understanding of how things are put together, but of course, I will be doing more work on this. The teeth are totally unrealistically proportioned though, just cause I wanted to draw them that way.