T.  Southwell, ?Notes on the genera Margaritifera and Aviculidea, and on post-mortem colour changes in echinoids?, Ceylon Marine Biological Reports, vol. Part 5.-March, 1911. Nos. 11 to 19. Report on certain scientific work done on the Ceylon pearl banks during the year 1910, pp. 205-208, 1911.

T.  Southwell, ?Notes on the genera Margaritifera and Aviculidea, and on post-mortem colour changes in echinoids?, Ceylon Marine Biological Reports, vol. Part 5.-Ma, pp. 205-208, 1911.