Well simple question..
When you look in the journal for Archaeology there's 10 things you can go for, which is:
Dwarf - Draenei - Fossil - Night Elf
Nerubian - Orc - Tol'vir - Troll
Vrykul - Some hat with a pickaxe, a shovel and some kind of bag or whip I don't know..
Can you tell me what that 10th thing is?