94 J. Alan Holman and Jerry N. McDonald 



404738, from Unit W3, SV-1. Right humerus: USNM 404739, from 

 Unit W3, SV-1. 



Remarks. — The small right ilium has a smooth vastus prominence 

 and has the posterodorsal border of its ilial crest sloping gently into the 

 dorsal acetabular expansion as in species of the Rana pipiens group 

 such as R. pipiens, R. blairi, R. berlandieri, and R. utricularia. But we 

 are unable to determine which of these species the ilium represents. The 

 Southern Leopard Frog, Rana utricularia, occurs in the area today. 

 This frog inhabits a wide variety of aquatic situations, and may move 

 quite a distance from the water in summer where growing plants pro- 

 vide shade and shelter. 



Class Reptilia 



Order Testudines 



Family Chelydridae 



Chelydra serpentina (Linnaeus), Snapping Turtle 



Material. — Partial nuchal bone: USNM 404740, from lowest part of 

 Unit W2, SV-1. Scapulocoracoid: USNM 404741, from ca. 5 cm above 

 base of Unit Wl, SV-1. 



Remarks. — These very characteristic bones represent a small Snap- 

 ping Turtle. Preston (1979) gave some characteristics of chelydrid shell 

 bones that allow identification of fragments. This species occurs in the 

 area today. Snapping Turtles inhabit almost any body of water that is 

 relatively slow moving and permanent (pers. observ.). 



Family Testudinidae 

 Chrysemys picta Schneider, Painted Turtle 

 Material. — Third right costal: USNM 404721 (Fig. 6), from Unit W2 

 (?) or W4 (?), CSB-2A. 



Remarks. — The smooth nature of the dorsal surface of this shell 

 bone, and the position of the impression of the seam for the second 

 epidermal shield, is diagnostic in Chrysemys picta. This turtle occurs in 

 the area today and is an inhabitant of quiet, vegetation-choked bodies 

 of water (pers. observ.). 



Order Squamata 



Family Colubridae 



Elaphe cf. E. obsoleta, Rat Snake 



Material. — Trunk vertebra: USNM 404742, from Unit W3, SV-2. 



Remarks. — Auffenberg (1963) gave vertebral characters of Elaphe 

 obsoleta. The above trunk vertebra is from a moderately large speci- 

 men. This snake occurs in the area today, and is a semiarboreal form 

 that favors wooded areas and woodland edges (pers. observ.). 

 Nerodia sipedon (Linnaeus), Northern Water Snake 



Material. — Trunk vertebra: USNM 404743, from Unit W3, SV-2. 



