2. Six-Eyed Sand Spider
This is a spider that is highly dangerous, but lives in such a remote region that few recorded cases of death are known. Sadly, the people it kills are rarely in a position to call home and tell people. It lives in the driest regions of Africa and South Asia. Just a tiny amount of venom will clot your blood which increases your blood pressure to the point where you sweat blood (it comes out of nastier areas too) before dying from cardiovascular failure. There is no anti-venom for this spider.