Plate 23. Fig. 1. Oak Openings, Lucas County. Habitat of Heterodon conlorlrix, 

 7 hamnophis saurilus saurilus, Ststrurus calenatus cateuat'ts and Terrapene Carolina. 

 Photo by Edward S. Thomas. Fig. 2. Hills near Beverly, Washington County. Habitat 

 of such forms as Sceloporus undulatus, Diadophis puuctalus edwardsit. Coluber con- 

 strictor constrictor, Elaphe obsoleia obsolela and Terrapene Carolina. Photo hy Edward 

 S. Thomas. 



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