James St. John:
Bivalves in fossiliferous sandstone (Marshall Sandstone, Lower Mississippian; near Jackson, Michigan, USA) 1
James St. John:
Bivalves in fossiliferous sandstone (Marshall Sandstone, Lower Mississippian; near Jackson, Michigan, USA) 2
James St. John:
Bivalves in fossiliferous sandstone (Marshall Sandstone, Lower Mississippian; near Jackson, Michigan, USA) 3
James St. John:
Bivalves in fossiliferous sandstone (Marshall Sandstone, Lower Mississippian; near Jackson, Michigan, USA) 4
James St. John:
Bivalves in fossiliferous sandstone (Marshall Sandstone, Lower Mississippian; near Jackson, Michigan, USA) 5
James St. John:
Bivalves in fossiliferous sandstone (Marshall Sandstone, Lower Mississippian; near Jackson, Michigan, USA) 6
James St. John:
Bivalves in fossiliferous sandstone (Marshall Sandstone, Lower Mississippian; near Jackson, Michigan, USA) 7