Historical reference: Do not rely on this information. It is very old. About this collection
Turrilites, a genus of Cephalopoda (q.v.) belonging to the group of Ammonoida (q.v.) or Ammonites. It differs from the typical representatives of this group in having the shell in the form of a spiral round a central axis. The genus is extinct, and is found only in the Cretaceous rocks.