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Upper San Pedro- shallow R.R. cut at SW limit of San Pedro Terrace, 2 to 3 ft. bed of gravel with fossils, particularly in ravine cutting bluff at Crawfish Georges. 252 species, 172 now living at San Pedro, 15 only N of San Pedro, 36 only S of San Pedro, 24 extinct, 4 doubtful.
Map of San Pedro
[Sketch map in field book]
