Natchitochia
Natchitochia is an extinct protocetid early whale known from the Middle Eocene (Bartonian, ) Cook Mountain Formation in Natchitoches Parish, Louisiana (, paleocoordinates ). "Natchitochia" is known from three incomplete ribs and thirteen vertebrae of which four are thoracics, five lumbars, one sacral, two caudals, and one of indeterminable position. "Natchitochia" is significantly larger than most other early protocetids, except "Eocetus" and "Pappocetus". The vertebrae of "Natchitochia" are smaller than those of "Eocetus" and lack (1) elongated lumbar centra and (2) the ventral keel seen on the vertebrae of "Pappocetus". The ribs are smaller than those of "Pappocetus". The fragmentary specimen was  collected in 1943 during a ground water survey and then sent to the United States National Museum where Remington Kellogg identified it as a new genus of archaeocete but never formally described it. finally described and named the genus and the species; the genus for the type locality and the species honors discoverer Paul H. Jones.