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References
Beddard, F. E., 1891. Anatomical Descriptions of two New Genera of Aquatic Oligochaeta. Trans. Roy. Soc. Edinb., 36: 273–305.
Benham, W. B., 1904. On some new species of the genus Phreodrilus. Quart. J. Micr. Sci. 48: 271–298.
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Dixon, G. C., 1915. Tubifex. L. M.B.C. Memoirs, 23. London. 100 pp.
Gates, G. E., 1956. Reproductive organ polymorphism in earthworms of the Oriental Megascolecine Genus Pheretima Kinberg 1867. Evolution, 10: 213–227.
Marcus, E., 1943. Sôbre Naididae do Brasil. Bol. Fac. Fil. Cien. Letr. Univ. S. Paulo, 32. Zoologia. No. 7, pp. 3–248.
Michaelsen, W., 1905. Die Oligochaeten der deutschen Südpolar-Expedition 1901–1903 nebst Erörterung der Hypothese über einem früheren grossen, die Südspitzen der Kontinente verbinden antarktischen Kontinent. In:Deutsche Südpolar-Exp. 1901–1903, 9, Zool. 1, pp. 5–7.
—— 1923. Oligochaten von Neuseeland und den Auckland-Campbell Inseln, nebst einigen anderen Pacifischen Formen. Dr. Th. Mortensen's Pacific Exp., 1914–16, No. 17, pp. 197–240.
Sperber, C., 1948. A Taxonomical Study of the Naididae. Zool. Bidr., 23: 1–296.
Stephenson, J., 1913. On a collection of Oligochaeta mainly from Ceylon. Sporia Zeylonica, 8: 251–276.
—— 1914. On a collection of Oligochaeta mainly from Northern India. Rec. Ind. Mus., 10: 231–365.
—— 1930. The Oligochaeta. Oxford University Press. 978 pp.
Stout, J. D., 1956. Aquatic Oligochaetes Occurring in Forest Litter. I. Trans. Roy. Soc. N.Z., 84: 97–102.
Walton, L. B., 1906. Naididae of Cedar Point, Ohio. Amer. Nat. 40: 683–706.
J. D. Stout, M.A., Ph.D.
,Soil Bureau Experimental Station,
Eastern Hutt Road,
Lower Hutt.