James St. John:
Onychodus sigmoides (fossil fish tooth whorl) (Onondaga Formation, Middle Devonian; near Canoga Springs, New York State, USA)
James St. John:
Platyostoma sp. (fossil snail) (Onondaga Limestone, Middle Devonian; Port Colbourne, Welland County, Ontario, Canada) 1
James St. John:
Platyostoma sp. (fossil snail) (Onondaga Limestone, Middle Devonian; Port Colbourne, Welland County, Ontario, Canada) 2
James St. John:
Platyostoma sp. (fossil snail) (Onondaga Limestone, Middle Devonian; Port Colbourne, Welland County, Ontario, Canada) 3
James St. John:
Chert (Onondaga Limestone, Middle Devonian; New York State, USA) 1
James St. John:
Chert (Onondaga Limestone, Middle Devonian; New York State, USA) 2
James St. John:
Chert (Onondaga Limestone, Middle Devonian; New York State, USA) 3
James St. John:
Chert (Onondaga Limestone, Middle Devonian; New York State, USA) 4
James St. John:
Chert (Onondaga Limestone, Middle Devonian; New York State, USA) 5
James St. John:
Chert (Onondaga Limestone, Middle Devonian; New York State, USA) 6
James St. John:
Chert (Onondaga Limestone, Middle Devonian; New York State, USA) 7
James St. John:
Chert (Onondaga Limestone, Middle Devonian; New York State, USA) 8
James St. John:
Chert (Onondaga Limestone, Middle Devonian; New York State, USA) 9
James St. John:
Chert (Onondaga Limestone, Middle Devonian; New York State, USA) 10
James St. John:
Chert (Onondaga Limestone, Middle Devonian; New York State, USA) 11
James St. John:
Chert arrowhead (Onondaga Limestone, Middle Devonian; New York State, USA) 1
James St. John:
Chert arrowhead (Onondaga Limestone, Middle Devonian; New York State, USA) 2
James St. John:
Chert arrowhead (Onondaga Limestone, Middle Devonian; New York State, USA) 3
James St. John:
Chert arrowhead (Onondaga Limestone, Middle Devonian; New York State, USA) 4
James St. John:
Chert arrowhead (Onondaga Limestone, Middle Devonian; New York State, USA) 5
James St. John:
Chert arrowhead (Onondaga Limestone, Middle Devonian; New York State, USA) 6
James St. John:
Chert (Onondaga Limestone, Middle Devonian; New York State, USA) 12
James St. John:
Chert (Onondaga Limestone, Middle Devonian; New York State, USA) 13
James St. John:
Chert (Onondaga Limestone, Middle Devonian; New York State, USA) 14
James St. John:
Chert (Onondaga Limestone, Middle Devonian; New York State, USA) 15
James St. John:
Chert arrowhead (Onondaga Limestone, Middle Devonian; New York State, USA) 7
James St. John:
Chert arrowhead (Onondaga Limestone, Middle Devonian; New York State, USA) 8