James St. John:
Borealosuchus wilsoni fossil crocodilian (Green River Formation, Lower Eocene; Fossil Lake Basin, southwestern Wyoming, USA) 1
James St. John:
Borealosuchus wilsoni fossil crocodilian (Green River Formation, Lower Eocene; Fossil Lake Basin, southwestern Wyoming, USA) 2
James St. John:
Crocodilian claw scratch marks (Dakota Sandstone, Lower Cretaceous; Dinosaur Ridge, Colorado, USA) 1
James St. John:
Crocodilian claw scratch marks (Dakota Sandstone, Lower Cretaceous; eastern side of Dinosaur Ridge, west of Denver, north-central Colorado, USA)
James St. John:
Crocodilian footprint on shoreline sandstone (Dakota Sandstone, Lower Cretaceous; eastern side of Dinosaur Ridge, Colorado, USA) 1
James St. John:
Crocodilian footprint on shoreline sandstone (Dakota Sandstone, Lower Cretaceous; eastern side of Dinosaur Ridge, Colorado, USA) 2
James St. John:
Crocodilian footprint on shoreline sandstone (Dakota Sandstone, Lower Cretaceous; eastern side of Dinosaur Ridge, Colorado, USA) 3
James St. John:
Crocodilian footprints on shoreline sandstone (Dakota Sandstone, Lower Cretaceous; eastern side of Dinosaur Ridge, Colorado, USA) 4
James St. John:
Goniopholis sp. (fossil crocodilian scales) (Morrison Formation, Upper Jurassic; Dinosaur National Monument, Utah, USA)
James St. John:
Goniopholis sp. (fossil crocodilian jawbone) (Morrison Formation, Upper Jurassic; Dinosaur National Monument, Utah, USA)
James St. John:
Alligator mississippiensis (fossil alligator jawbone) (Neogene; South Carolina, USA) 1
James St. John:
Alligator mississippiensis (fossil alligator jawbone) (Neogene; South Carolina, USA) 2
James St. John:
Crocodilian claw scratch marks (Dakota Sandstone, Lower Cretaceous; Dinosaur Ridge, Colorado, USA) 2
James St. John:
Crocodilian claw scratch marks (Dakota Sandstone, Lower Cretaceous; Dinosaur Ridge, Colorado, USA) 3
James St. John:
Crocodilian claw scratch marks (Dakota Sandstone, Lower Cretaceous; Dinosaur Ridge, Colorado, USA) 4
James St. John:
Crocodilian claw scratch marks (Dakota Sandstone, Lower Cretaceous; Dinosaur Ridge, Colorado, USA) 5
James St. John:
Crocodilian claw scratch marks (Dakota Sandstone, Lower Cretaceous; Dinosaur Ridge, Colorado, USA) 6
James St. John:
Crocodilian claw scratch marks (Dakota Sandstone, Lower Cretaceous; Dinosaur Ridge, Colorado, USA) 7
James St. John:
Crocodilian claw scratch marks (Dakota Sandstone, Lower Cretaceous; Dinosaur Ridge, Colorado, USA) 8
James St. John:
Crocodilian claw scratch marks (Dakota Sandstone, Lower Cretaceous; Dinosaur Ridge, Colorado, USA) 9
James St. John:
Crocodilian footprint (Dakota Sandstone, Lower Cretaceous; Dinosaur Ridge, Colorado, USA) 4
James St. John:
Crocodilian footprint (Dakota Sandstone, Lower Cretaceous; Dinosaur Ridge, Colorado, USA) 5
James St. John:
Crocodilian footprint (Dakota Sandstone, Lower Cretaceous; Dinosaur Ridge, Colorado, USA) 6
James St. John:
Crocodilian footprint (Dakota Sandstone, Lower Cretaceous; Dinosaur Ridge, Colorado, USA) 7
James St. John:
Crocodilian footprint (Dakota Sandstone, Lower Cretaceous; Dinosaur Ridge, Colorado, USA) 8
James St. John:
Crocodilian footprint (Dakota Sandstone, Lower Cretaceous; Dinosaur Ridge, Colorado, USA) 9
James St. John:
Crocodilian footprint (Dakota Sandstone, Lower Cretaceous; Dinosaur Ridge, Colorado, USA) 10
James St. John:
Crocodilian footprint (Dakota Sandstone, Lower Cretaceous; Dinosaur Ridge, Colorado, USA) 11
James St. John:
Crocodilian footprint (Dakota Sandstone, Lower Cretaceous; Dinosaur Ridge, Colorado, USA) 12
James St. John:
Crocodilian footprint (Dakota Sandstone, Lower Cretaceous; Dinosaur Ridge, Colorado, USA) 13
