Published in Proceedings of the Zoological Society of London, in 1921, in volume 1920, pages 623-628

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 1-29

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 31-34

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 35-98

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 99-102

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 103-142

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 143-156

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 157-177

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 179-182

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 183

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 184-186

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 187-196

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 197-214

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 215-220

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 221-228

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 229-232

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 233-248

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 249-266

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 267-276

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 277-322

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 323-356

Published in Proceedings of the Zoological Society of London, in 1921, in volume 1921, pages 357-378

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 379-387

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 389-422

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 423-440

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 441-446

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 447-472

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 473-486

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 487-492

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 493-496

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 525-534

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 535-546

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 547-577

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 579-586

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 587-590

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 591-607

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 609-642

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 643-646

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 647-674

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 729-739

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 741-755

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 757-767

Published in Proceedings of the Zoological Society of London, in 1921, in volume 1921, pages 769-802

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 803-837

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 851-882

Published in Proceedings of The Zoological Society of London, in 1921, in volume 1921, pages 883-887