Unionid Mollusks 
71 
Fig. 2. The Cape Fear Basin. The dashed lines indicate the approximate 
boundaries of the Fall Zone. PP, Piedmont Plateau; FZ, Fall Zone; CP, Coastal 
Plain. Collecting sites are as follows (numbers and dots indicate new sites 
sampled in this study, letters and squares indicate ones cited in the literature): 
Piedmont Plateau Physiographic Province 
Haw River Sub-basin 
Rockingham County 
A. Haw R. ca. 2.0 km NE Benaja (Johnson 1970) 
Guilford County 
1. Lake Brandt 
2. Lake at Greensboro Country Park 
3. Lake at Boy Scout Camp 
4. Lake Philadelphia 
5. Lake at Hamilton Lakes subdivision 
6. Lake on UNC-Greensboro campus 
7. Alamance Cr., precise location unknown 
8. Stinking Quarter Cr., precise location unknown 
9. Lake at Kimesville 
B. Buffalo Cr., 1.6 km E Greensboro (Johnson 1970) 
C. Travis Cr. r ca. 2.4 km N Gibsonville (Johnson 1970) 
Alamance County 
10. Alamance Cr., precise location unknown 
Orange County 
1 1. University Lake, Chapel Hill 
12. Booker Cr. at crossing of US 15-501, Chapel Hill 
D. Morgan Cr., ca. 1.6 km SE Chapel Hill 
Durham County 
E. New Hope Cr., Duke Forest, Durham vicinity (Johnson 1970) 
Chatham County 
13. Terrell Cr. ca. 0.2 km above confluence with Haw R., ca. 
13.6 km ENE Pittsboro 
14. Haw R. at crossing of US 64, ca. 6.4 km ENE Pittsboro 
Deep River Sub-basin 
Randolph County 
15. Deep R., precise location unknown 
F. Sandy Cr., precise location unknown (Johnson 1970) 
Moore County 
16. Deep R. at Highfalls 
Chatham County 
17. Rocky R. at crossing of secondary road 2170, ca. 8.5 km SE Siler City 
18. Rocky R. at crossing of NC 902, ca. 1 1.2 km SW Pittsboro 
19. Rocky R. at crossing of secondary road 1010, ca. 17.6 km N 
Sanford and 9. 1 km SW Pittsboro 
20. Rocky R. ca. 0.2 km above confluence with Deep R., ca. 8.0 km S 
Pittsboro 
21. Bear Cr. at crossing of NC 902, ca. 14.6 km S Siler City 
22. Bear Cr. at crossing of secondary road 2187, ca. 15.7 km SW Pittsboro 
23. Bear Cr. at crossing of secondary road 1010, ca. 9.1 km SW Pittsboro 
24. Bear Cr. at crossing or secondary road 2155, ca. 12.6 km SW Pittsboro 
Chatham-Lee Counties 
25. Deep R. below crossing of US 15-501 near disjunct 
White Pine community, ca. 13.4 km S Pittsboro 
26. Deep R. at crossing of US 1, ca. 17.9 km NE Sanford 
G. Deep R. at Gulf (Johnson 1970) 
