Goodrich, Quart. J. Micr. Sci. xxxiv. 1893, p. 387.
Benham, Quart. J. Micr. Sci. xxxii. 1891, p. 325. See also Bourne (nephridium of Polynoë), Tr. Linn. Soc. (Zool.), ii. 1883, p. 357; Meyer, for nephridium of Terebellidae, Sabellidae, and Cirratulidae, in Mt. Zool. Stat. Neapel, vii. 1887, p. 592.
It is worthy of note that in Aeolosoma alone amongst the Oligochaeta does the brain lie in the prostomium in the adult.
Andrews, "The Eyes of Polychaetes," J. Morph. vii. 1892, p. 169.
Wistinghausen, "Entwick. v. N. dumerilii," Mt. Zool. Stat. Neapel, x. 1891, p. 41.