Prehistoric Philippines - Bovid or Bovidae fossil tooth, display at National Museum of Natural History, Manila. Bovid is a prehistoric ancestor of modern day Cow, goat, sheep etc. | Facebook
Big tooth Cow or Bison? - Fossil ID - The Fossil Forum
91" Fossil Cow Shark (Notorynchus) Tooth - Maryland (#71100) For Sale - FossilEra.com
Possible bison tooth? or plain old cow - ArrowHeads.com
Tooth Id Bison? Or Cow? - Fossil ID - The Fossil Forum
Top quality great Notidanodon Loozi Cow shark tooth fossil | eBay
Cow Tooth? - Fossil ID - The Fossil Forum
FOSSIL BISON TEETH SET. SOME VERY RARE .SOME OVER 3"LONG | eBay
What's this fossil? Looks like a tooth to me. Found in UK, can't remember where. Either Scotland or Wales when I was on holiday at the beach. (More info in comments) :