James St. John:
Laevicardium serratum (common egg cockle) (San Salvador Island, Bahamas) 1
James St. John:
Laevicardium serratum (common egg cockle) (San Salvador Island, Bahamas) 2
James St. John:
Laevicardium serratum (common egg cockle) (San Salvador Island, Bahamas) 3
James St. John:
Acanthocardia aculeata (European spiny cockle)
James St. John:
Clinocardium nuttallii (Nuttall's cockle) 1
James St. John:
Clinocardium nuttallii (Nuttall's cockle) 2
James St. John:
Nemocardium bechei (de la Beche's cockle) 1
James St. John:
Nemocardium bechei (de la Beche's cockle) 2
James St. John:
Nemocardium bechei (de la Beche's cockle) 3
James St. John:
Laevicardium elatum (giant Pacific cockle)
James St. John:
Cardium indicum (hians cockle) 1
James St. John:
Cardium indicum (hians cockle) 2
James St. John:
Cardium indicum (hians cockle) 3
James St. John:
Trachycardium magnum (magnum cockle) 1
James St. John:
Trachycardium magnum (magnum cockle) 2
James St. John:
Dinocardium robustum (Atlantic giant cockle shell) (Sanibel Island or Cayo Costa Island, Florida, USA) 1
James St. John:
Dinocardium robustum (Atlantic giant cockle shell) (Sanibel Island or Cayo Costa Island, Florida, USA) 2
James St. John:
Dinocardium robustum (Atlantic giant cockle shell) (Sanibel Island or Cayo Costa Island, Florida, USA) 3
James St. John:
Dinocardium robustum (Atlantic giant cockle shell) (Sanibel Island or Cayo Costa Island, Florida, USA) 4
James St. John:
Clinocardium nuttallii (basket cockle) (Puget Sound, Washington State, USA) 1
James St. John:
Clinocardium nuttallii (basket cockle) (Puget Sound, Washington State, USA) 2
James St. John:
Dinocardium robustum (Atlantic giant cockle shell) (Sanibel Island, Florida, USA) 1
James St. John:
Dinocardium robustum (Atlantic giant cockle shell) (Sanibel Island, Florida, USA) 2
James St. John:
Dinocardium robustum (Atlantic giant cockle shell) (Sanibel Island, Florida, USA) 3
James St. John:
Dinocardium robustum (Atlantic giant cockle shell) (Sanibel Island, Florida, USA) 4
James St. John:
Dinocardium robustum (Atlantic giant cockle shell) (Sanibel Island, Florida, USA) 5
James St. John:
Dinocardium robustum (Atlantic giant cockle shell) (Sanibel Island, Florida, USA) 6
James St. John:
Trachycardium muricatum (yellow prickly cockle shell) (Sanibel Island, Florida, USA) 1
James St. John:
Trachycardium muricatum (yellow prickly cockle shell) (Sanibel Island, Florida, USA) 2
James St. John:
Laevicardium serratum (common egg cockle) (St. Thomas, Virgin Islands) 1
