Plate 10. 



Fig. 1. Sauvagesia degloyeri Stanton (?). View, natural size, of surface 

 sculpture opposite the siphonal areas, of a specimen from the upper part 

 of the San Felipe formation. Las Flores hacienda, from an arroyo 6 kilo- 

 meters west by south of Manual station. Cat. No. 32503, U.S.N.M. Page 9. 



Fig. 2. View of the specimen shown in figure 1, on the side bearing the sii>honal 

 areas (E) and (S). Pago 9. 



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