Barnhart
Barnhart was a male Human Starfleet crewman who lived during the mid-23rd century. He served aboard the  under Captain James T. Kirk in 2266.

That year, Barnhart was performing maintenance on the ship's atmospheric system when he became one of a number of Enterprise crewmembers killed by  which had infiltrated the ship and was extracting all of the sodium chloride from its victims. Barnhart's body was discovered by Janice Rand and Hikaru Sulu on deck nine, section two. Upon discovering his body, Rand noted the skin mottling on his face, while Sulu called a medical team. Sulu later reported the casualty to Kirk, noting the cause to be the same symptoms that had killed Sturgeon and Darnell, as well as confirming the presence to the M-113 creature aboard the Enterprise. ()

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Humans
USS Enterprise (NCC-1701) personnel