The Watkins snark is the snark on 50 vertices ad 75 nodes illustrated above. It is implemented in the Wolfram Language as GraphData["WatkinsSnark"].
The Watkins snark is a 
cyclic group graph.
Watkins Snark
See also
SnarkExplore with Wolfram|Alpha
References
Read, R. C. and Wilson, R. J. An Atlas of Graphs. Oxford, England: Oxford University Press, p. 281, 1998.Watkins, J. J. "Snarks." Ann. New York Acad. Sci. 576, 606-622, 1989.Watkins, J. J. and Wilson, R. J. "A Survey of Snarks." In Graph Theory, Combinatorics, and Applications (Ed. Y. Alavi, G. Chartrand, O. R. Oellermann, and A. J. Schwenk). New York: Wiley, pp. 1129-1144, 1991.Cite this as:
Weisstein, Eric W. "Watkins Snark." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/WatkinsSnark.html