Published in Proceedings of The Malacological Society of London, in 1921, in volume 14, pages 148-150

Published in Proceedings of The Malacological Society of London, in 1921, in volume 14, pages 125-127

Published in Proceedings of The Malacological Society of London, in 1921, in volume 14, pages 209-220

Published in Proceedings of The Malacological Society of London, in 1921, in volume 14, pages 191-195

Published in Proceedings of the Malacological Society of London, in 1921, in volume 14, pages 174-190

Published in Proceedings of the Malacological Society of London, in 1921, in volume 14, issue 4, pages 117-118

Published in Proceedings of the Malacological Society of London, in 1921, in volume 14, issue 4, pages 118-119

Published in Proceedings of the Malacological Society of London, in 1921, in volume 14, issue 4, pages 119

Published in Proceedings of the Malacological Society of London, in 1921, in volume 14, issue 4, pages 123

Published in Proceedings of the Malacological Society of London, in 1921, in volume 14, issue 4, pages 124

Published in Proceedings of the Malacological Society of London, in 1921, in volume 14, issue 4, pages 131-134

Published in Proceedings of the Malacological Society of London, in 1921, in volume 14, issue 4, pages 135-138

Published in Proceedings of the Malacological Society of London, in 1921, in volume 14, issue 4, pages 139-140

Published in Proceedings of the Malacological Society of London, in 1921, in volume 14, issue 4, pages 141-147

Published in Proceedings of the Malacological Society of London, in 1921, in volume 14, issue 4, pages 151-160

Published in Proceedings of the Malacological Society of London, in 1921, in volume 14, issue 5-6, pages 161

Published in Proceedings of the Malacological Society of London, in 1921, in volume 14, issue 5-6, pages 163-167

Published in Proceedings of the Malacological Society of London, in 1921, in volume 14, issue 5-6, pages 173

Published in Proceedings of the Malacological Society of London, in 1921, in volume 14, issue 5-6, pages 198-208

Published in Proceedings of the Malacological Society of London, in 1921, in volume 14, issue 5-6, pages 221-226

Published in Proceedings of the Malacological Society of London, in 1921, in volume 14, issue 5-6, pages 227-231

Published in Proceedings of the Malacological Society of London, in 1921, in volume 14, issue 5-6, pages 233-236