Published in Proceedings of The Malacological Society of London, in 1919, in volume 13, pages 41-65
Published in Proceedings of The Malacological Society of London, in 1919, in volume 13, pages 75-77
Published in Proceedings of The Malacological Society of London, in 1919, in volume 13, pages 69-72
Published in Proceedings of The Malacological Society of London, in 1919, in volume 13, pages 79-84
Published in Proceedings of the Malacological Society of London, in 1919, in volume 13, pages 118-119
Published in Proceedings of the Malacological Society of London, in 1919, in volume 13, pages 152-153
Published in Proceedings of the Malacological Society of London, in 1919, in volume 13, pages 68