THE REPTILES OF OHIO 265 



edge of the bar, its head and neck above water. When Wood dropped a 

 pebble from the bridge only one of the lot took alarm. All proved to be 

 extremely wary when an attempt was made to approach them by foot along 

 the bar. 



Trautman reports that he saw a concentration of upwards of fifty of these 

 turtles along the West Branch of the St. Joseph River, in Williams County, 

 on May 21, 1941. 



SUPPLEMENTARY REFERENCES 



(Chiefly those published since 1938, but including some others that are mentioned 



in the revisionary text.) 



Blanchard, Frank N. and I'rieda Cobb Blanchard 1941 — TTie inheritance of 

 melanism m the garter snake Thamnophis sirtalis sirlalis (Linnaeus), and some 

 evidence of effective autumn mating. Pap. Michigan Acad. Sci., Arts, Lett., 



vol. XXVI, pp. 177-192. 



Cagle, Fred R. 1950 — The life history of the slider turtle, PseitdcmMs scripla troosdi 

 (Holbrooh). Ecol. Mono., vol. 20, no. I, pp. 31-54, figs. 1-18' 



CoNANT, Roger 1938a — The reptiles of Ohio. Amer. Midi. Nat., vol. 20, nn. I, pp. 

 1-200, pis. 1-26, maps 1-38. 



• 1938b — On the seasonal occurrence of reptiles in Lucas County, Ohio. Her- 



petologica, vol. 1, pp. 137-144, figs. 1-2. 



1940 — A new subspecies of the fox snake, Elaphe Viilpina Bnird and Girard. 



Ibid., vol. 2, no. 1, pp. 1-14, pi. 1, fig. 1, map 1. 



1942 — Notes on the young of three recently described snakes, with comments 



upon their relationships. Bull. Chicago Acad. Sci., vol. 6. no. 10, pp. 193-200. 



■1943a- — Studies on North .American water snakes — I: Natrix f(irdanJii (Ken- 



nicotl). Amer. Midi. Nat., vol. 29, no. 2, pp. 313-341, figs. 1-2, pi. 1, map. 



■ 1943b — The milk snakes of the Atlantic coastal plain. Proc. New England 



Zool. Club, vol. XXII, pp. 3-24, pis. II-IV, map. 



1943c — Nairix ervihrogasier ervlhrogailer in the northeastern part of its range. 



Herpetologica, vol. 2, no. 5, pp. 83-6. 



1949 — Two new races of Natrix eryihrogaslcr. Copeia, pp. 1-15, pi. 1. 



1950 — On the taxonomic status of Thamnophis hulleri (Cojjs). Bull. Chicago 



Acad. Sci., vol. 9, no. 4, pp. 71-77. 



■ AND William Bridges 1939 — What snake is that? .Appleton-Century, pp. i- 



X. 1-163, pis. 1-32. 



and Alexander Downs, Jr. 1940 — Miscellaneous notes on the eggs and young 



of reptiles. Zoologica, vol. XXV, part 1, pp. 33-48. 



AND Coleman J. Coin 1948 — A new subspecies of soft-shelled turtle from the 



central United States, with comments on the application of the name Am\;da. 

 Occ. Pap. Mus. Zool., Univ. Michigan, no. 510, pp. 1-23, p!s. I-II. 



, Edward S. Thomas, and Robert L. Rausch 1945 — The plains garter snake, 



Thamnophis radix, in Ohio. Copeia, pp. 61-8, pis. I-II, map I. 



Dexter, Ralph W. 1944 — New records of reptiles from Portage County, Ohio. I hid., 



p. 252. 



1948 — More records of reptiles from Portage County, Ohio. Ibid., p. 139. 



DuELLMAN, William E. 1947 — Herpetological records from Logan County, Ohio. 

 Ibid., p. 208. 



DuNN, Emmett Reid and Gilbert Congdon Wood 1939 — Notes on eastern snakes 

 of the genus Coluber. Notulae Naturae, no. 5, pp. 1-4, 1 fig. 



Edgren, Richard A., Jr. 1948 — Some additional notes on Michigan Pseudemvs. Nat. 

 Hist. Misc., no. 22, pp. 1-2. 



