Southern black racer (scientific name: "Coluber constrictor"), the racer is more likely to suffocate or crush its victim into the ground, rather than coiling around it in typical constrictor fashion. Man remains the greatest enemy of black racers. Many are killed on highways and others are intentionally killed out of fear. The white chin causes some people to kill this snake, believing that it is a cottonmouth – a venomous snake more commonly called a water moccasin. The venomous snake has a white lining inside of its mouth. Racers are nonvenomous and do not breed with cottonmouths. Natural enemies include such birds of
U. S. R. Murty of the Journal of Combinatorial Theory, Series B. U. S. R. Murty Uppaluri Siva Ramachandra Murty, or U. S. R. Murty (as he prefers to write his name), is a Professor Emeritus of the Department of Combinatorics and Optimization, University of Waterloo. U. S. R. Murty received his Ph.D. in 1967 from the Indian Statistical Institute, Calcutta, with a thesis on extremal graph theory; his advisor was C. R. Rao. Murty is well known for his work in matroid theory and graph theory, and mainly for being a co-author with J. A. Bondy of a textbook on graph theory. Murty