Published in Annals of The South African Museum, in 1921, in volume 12, pages 217-321

Published in Annals of the South African Museum, in 1921, in volume 18, pages 181-230

Published in Annals of the South African Museum, in 1921, in volume 18, pages 231-234

Published in Annals of The South African Museum, in 1921, in volume 18, pages 235-244

Published in Annals of the South Africa Museum, in 1921, in volume 18, pages 245-445

Published in Annals of the South African Museum, in 1921, in volume 18, pages 453-468

Published in Annals of The South African Museum, in 1921, in volume 18, pages 469-478

Published in Annals of the South African Museum, in 1921, in volume 18, issue 1, pages 1-180