I recognized them immediately as Ishi Points. There was movie made years ago about Ishi called The Last Of His Tribe and starring Graham Greene as Ishi. If you ever get the chance to watch this movie then do so, it is a very good movie.
"Welcome back my friends, to the show that never ends."
The anthropologists that "discovered" Ishi wrote a pretty cool book about him. It's actually a great story. He came and lived at the museum and taught them all kinds of cool stuff. They even went hunting with him and harvested a deer with his bow and stone tipped arrows.
Can't recall the title off hand but saw it recently in a book store so it's still in print.