During the summer of 1934, nematodes of the genus Dracunculus were found in a number of garter snakes (Thamnophis sirtalis) from the vicinity of the Biological Station of the University of Michigan, located on Douglas Lake in the northern tip of the southern peninsula of Michigan. These worms were found again during the summers of 1935, 1936, and 1937. Since morphological studies showed that these worms represent a species as yet undescribed, the name Dracunculus ophidensis is proposed for them.