Mors in roman mythology was the Roman god of death who replaced the Greek god Thanatos, and according to legend was one of the twin sons of Nyx.
He resided in a portion of the remote cave provided by Somnus, the god of sleep, beside the river Lethe. Ovid depicts him as a hideous and cadaverous figure dressed in a winding sheet and holding a scythe and an hour glass.
He became known particularly through Lacedaemonian culture where twin statues of Mors and Somnus were placed side by side. A.G.H.
Source:
Jordan, Michael, Encyclopedia of Gods, New York, Facts On File, Inc. 1993, p. 170