There was a Museum Docent, a Curator of Vertebrate Paleontology and a Museum Director who were killed and go up before St. Peter. Saint Peter tells them there is a test to get into heaven as heaven is pretty crowded.
First he shows a saber tooth cat skull to the docent and asks him to give its common name. The docent replys “saber tooth cat” and is admitted to heaven.
Next, St. Peter asks the curator to give its scientific name. He quickly says, “Smilodon Californius” and St. Peter says, go right in.
St. Peter then quickly places the skull behind his back and says to the Museum Director, OK, what’s its catalog number?