Place
- Oakland1
- Ohio1
- Onekama1
- Orange Tp., ca. 5.5 mi. SE of South Boardman1
- Oscoda1
- Park Twp.1
- Presque Isle1
- Raisin Twp., se. of golf course, near s. edge of n. section of Ives Rd.1
- Randey's Point, west shore of Lake Michigan1
- Rock Creek Park, Washington, D. C.1
- Root Lake near Williamsburg1
- Royal Oak Tp.1
- S side of Lake Harold (Toad L.), ca. 4 mi. SE of Alba1
- Saginaw1
- San Francisco1
- Sand Lake1
- Scotty Bay1
- Senaca Twp.1
- Sharon Hollow1
- Silver Creek Tp., ca. 6.5 mi. NW of Dowagiac, Dewey Lake1