Published in Proceedings of The Zoological Society of London, in 1920, in volume 1920, pages 311-342

Published in Proc. Zool. Soc. London, in 1920, in volume 1920, pages 131-167

Published in Proc. Zool. Soc. London, in 1920, in volume 1920, pages 77-83

Published in Proceedings of the Zoological Society of London, in 1920, in volume 1920, pages 1-26

Published in Proceedings of The Zoological Society of London, in 1920, in volume 1920, pages 195-243

Published in Proceedings of The Zoological Society of London, in 1920, in volume 1920, pages 367-389

Published in Proceedings of The Zoological Society of London, in 1920, in volume 1920, pages 405-410

Published in Proceedings of The Zoological Society of London, in 1920, in volume 1920, pages 411-420

Published in Proceedings of The Zoological Society of London, in 1920, in volume 1920, pages 423-436

Published in Proceedings of The Zoological Society of London, in 1920, in volume 1920, pages 437-439

Published in Proceedings of The Zoological Society of London, in 1920, in volume 1920, pages 441-447

Published in Proceedings of The Zoological Society of London, in 1920, in volume 1920, pages 449-456

Published in Proceedings of The Zoological Society of London, in 1920, in volume 1920, pages 457-465

Published in Proceedings of The Zoological Society of London, in 1920, in volume 1920, pages 467-474

Published in Proceedings of The Zoological Society of London, in 1920, in volume 1920, pages 475-490

Published in Proceedings of The Zoological Society of London, in 1920, in volume 1920, pages 629-647

Published in Proceedings of The Zoological Society of London, in 1920, in volume 1920, pages 653-656

Published in Proceedings of The Zoological Society of London, in 1920, in volume 1920, pages 31-48

Published in Proceedings of The Zoological Society of London, in 1920, in volume 1920, pages 491-505

Published in Proceedings of The Zoological Society of London, in 1920, in volume 1920, pages 245-310

Published in Proceedings of The Zoological Society of London, in 1920, in volume 1920, pages 49-60

Published in Proceedings of The Zoological Society of London, in 1920, in volume 1920, pages 343-355