Title: Variations and relationships in the snakes of the genus Pituophis
Description: From its wide range and varied habitat, its conspicuous size and pattern, and its abundance the genus Pituophis is probably one of the best-known genera of North American snakes. The purpose of the present study is to define the taxonomy status of the included forms on a structural and geographic basis, to determine their mutual affinities as far as is possible from the available material, and to assemble the accumulated data concerning them.
Subjects: Animals, Pituophis, Variation