St. Joseph, "Les Annélides Polychétes des côtes de Dinard," Ann. Sci. Nat. (Zool.) (7) vol. i. 1886, p. 127; v. 1888, p. 141; xvii. 1894, p. 1; xx. 1895, p. 185.
Malaquin, Recherches sur les Syllidiens, 1893; for structure of the gizzard, see also Haswell, Quart. J. Micr. Sci. xxvi. 1886, p. 471; and xxx. 1889, p. 31.
See M‘Intosh's Memoirs, loc. cit.
Herein are included the various genera formed by Kinberg, Malmgren, and others.
It appears to be the same as P. grubiana Clap.