Plate I. Photograph of excavation for Barosaurus lentus Marsh at Piedmont, South 
Dakota, October 2, 1895. Looking southeast to east. Showing group of 
vertebrae N, O, P, and Q, with cervical T marked by large pick, and point 
of further excavation by small hand pick. Photograph by G. R. Wieland, 
American Fossil Cycads, Plate L, photograph 2. Courtesy of Doctor 
Wieland. 
