Published in Proceedings of The Malacological Society of London, in 1920, in volume 14, pages 31-33

Published in Proceedings of The Malacological Society of London, in 1920, in volume 14, pages 74-76

Published in Proceedings of The Malacological Society of London, in 1920, in volume 14, pages 2

Published in Proceedings of The Malacological Society of London, in 1920, in volume 14, pages 91-113

Published in Proceedings of the Malacological Society of London, in 1920, in volume 14, pages 114-115

Published in Proceedings of the Malacological Society of London, in 1920, in volume 14, issue 1, pages 5

Published in Proceedings of the Malacological Society of London, in 1920, in volume 14, issue 1, pages 6-30

Published in Proceedings of the Malacological Society of London, in 1920, in volume 14, issue 1, pages 34-42

Published in Proceedings of the Malacological Society of London, in 1920, in volume 14, issue 2-3, pages 43-45

Published in Proceedings of the Malacological Society of London, in 1920, in volume 14, issue 2-3, pages 45-46

Published in Proceedings of the Malacological Society of London, in 1920, in volume 14, issue 2-3, pages 46-47

Published in Proceedings of the Malacological Society of London, in 1920, in volume 14, issue 2-3, pages 47-48

Published in Proceedings of the Malacological Society of London, in 1920, in volume 14, issue 2-3, pages 48

Published in Proceedings of the Malacological Society of London, in 1920, in volume 14, issue 2-3, pages 51

Published in Proceedings of the Malacological Society of London, in 1920, in volume 14, issue 2-3, pages 73

Published in Proceedings of the Malacological Society of London, in 1920, in volume 14, issue 2-3, pages 77-90

Published in Proceedings of the Malacological Society of London, in 1920, in volume 14, issue 2-3, pages 116

Published in Proceedings of the Malacological Society of London, in 1920, in volume 14, pages 52-73