[61]. “Société de Biologie, Séance du 29 décembre, 1903.”
[62]. “Comptes Rendus de l’Académie des Sciences,” Vol. 133, pp. 603–605, Oct. 14, 1901.
[63]. “Proceedings of the Zoölogical Society of London,” Vol. I, pp. 140–166.
[64]. “Proceedings of the Zoölogical Society of London,” 1902, pp. 148–150.
[65]. “Comptes Rendus de l’Académie des Sciences,” Paris, 1903, Vol. CXXXVII, pp. 611–613.
[66]. Seurat, “Observation sur l’évolution de l’Huitre perlière des Tuamotu et des Gambier,” 1904.
[67]. “Pearl Oyster Fisheries of the Gulf of Manaar,” London, 1903, Vol. I, p. 11.
[68]. Hornell, “Report on the Placuna placenta Pearl Fishery of Lake Tampalakamam,” Colombo, 1906.
[69]. “Pearl Oyster Fisheries of the Gulf of Manaar,” London, 1903, Vol. I, p. 10.
[70]. Harley, “Proceedings of the Royal Society,” Vol. XLIII, p. 461.