What are these arrow shaped bones?

Question

I was walking by the Trinity river and found these arrowhead shaped bone things with grooves in it. What are they?

Answer

You might get an answer if you upload pictures to an image host and post links to them here. Otherwise, nobody has any idea what you have there. tinypic.com is such a site, and there are many others.

What are these arrow shaped bones?

Answers (1)