268 THE AMERICAN MIDLAND NATURALIST 



1949 — Obiervaticns on Nalrix seplemvittala (Say) in southwestern Ohio. Amer 



Midi. Nat., vol. 42. no. 3. pp. 744-50. 



AND William Edward Duellman 1947a — Range extension of Natrix l(irl- 



landli in Ohio. Herpetologica. vol. 3, p. 151. 



1947b — Preliminary herpetological survey of Montgomery County, Ohio. Ibid., 



vol. 4, pp. 3-6. 



1950 — Size and scutellation in Natrix septemvitlata (Say) in southwestern Ohio. 



Amer. Midi. Nat., vol. 43. no. 1. pp. 173-8. 



