DITRYPA ARIETINA. 381 
SYNONYMS. 
1758. Dentale leve curvum album, Borlase. Cornwall, p. 276, t. xxv, fig. 5. 
» Nerpula arenaria, Linneeus. Syst. Nat., 10th edit., p. 787. 
1776. Dentaliwm arietinum, O. F. Miller. Prodr. Zool. Dan., p. 236, No. 2853. 
1783. Figure in Schroéter, Em. indic. Conch., vol. 11, pl. vi, fig. 17. 
1803. Dentaliwm gadus, Montagu. ‘Test. Brit., p. 496. 
1818. Ditrupa subulata, Lamarck. Anim. s. Vert., 2nd Hdit., t. v, p. 637. 
5 a coarctatum, idem. Ibid., p. 599. 
1825. Dentaliwm subulatum, Deshayes. Mém. Soc. hist. nat. Paris, p. 373, pl. xvi, fig. 29. 
1835. Ditrupa subulata, Berkeley. Zool. Journ., v, p. 424, pl. xix, fig. 2. 
»  Nerpula lubera, Sars. Beskriv., p. 52, pl. xu, figs. 33 a, b, c. 
1843-53. Ditrupa subulata, Chenu. Illust. Conch., livr. 11°™°, pl. vu, fig. 13. 
_ Dentalium strangulatum var., idem. Ibid., 1, pl. vi, fig. 24. 
1845. Serpula libera, Girsted. Fortegnelse, p. 18. 
1851. Ditrupa arietina, Sars. Nyt Mag. f. Naturvid., Bd. vi, p. 204. 
» NSerpula and Placostegus libera, Grube. Fam. Annel., pp. 91 and 142. 
1853. Ditrypa arvetina, Sars. Nyt Mag., vi, p. 390. 
1854. % libera, Danielssen. Zool. Reise, Norske Vid.-selsk. Skr., p. 125. 
1857. 3 arvetina, Koren. Nyt Mag., ix, p. 94. 
1859. Ditrupa a Danielssen. Kgl. Norske Vid.-selsk. Skrift., 4¢° Bd., p. 125. 
1861. Ditrypa . idem. Nyt Mag., xi, p. 562. 
1861-8. Ditrupa cornea, Morch. Rev. Serp. Naturhist. Tidsskr., p. 425. 
arcuata, idem. Ibid., p. 425. 
gadus, idem. Ibid., p. 426. 
ce By arietina, idem. Ibid., p. 424. 
1865. me subulata, De Quatrefages, Annel., t. 1, p. 494. 
coarctata, idem. Ibid., p. 495. 
libera, idem. Ibid., p. 495. 
Ditrypa arietina, Johnston. Cat. Worms Brit. Mus., pp. 273 and 347. 
3) 
1867. 5 5 Malmgren. Annul. Polych., p. 122. 
1874. i Malm. Annul. Goteb., p. 103. 
1878. i s Hansen. Archiv Mat. og Nat. (Christ.), iii, p. 43, pl. iii, figs. 7—11. 
ie 7 gracillima, Grube. Annul. Semper. (Mém. l’Acad. St. Pétersb.), xxv, p. 279. 
1879. BS arvetina, Tauber. Annul. Danica, p. 140. 
Me 3 libera, idem. Ibid., p. 141. 
1880. es arvetina, Langerhans. Zeitschr. f. wiss. Zool., xxxiv, p. 121, pl. v, fig. 39. 
1884. 53 ‘ Levinsen. Vidensk. Meddels., p. 198. 
1885. % 99 McIntosh. “Challenger” Ann. (xii), p. 531, pl. liv, fig. 6. 
1891. a ss Appellof. Bergens Mus. Aarb., p. 8. 
1893. Ditrupa subulata, Lo Bianco. Atti Acad. Sc. Nap., 2 ser., v, p. 87. 
1894. Ditrypa arietina, Bidenkap. Christ. Vet. Selsk. Forhandl., p. 139. 
1896. sp 3 Appellot. Berg. Mus. Aarb., xiii, p. 12 (sep. copy). 
,  Ditrypa aretina, Roule. Annel. “Caudan,” p. 463, pls. xxii and xxv, figs. 12, 13, 14, 
15, 32, 33. 
1897. 5 Ss Michaelsen. Polych. deutsch. Meere., p. 190. 
1898. . 3 De St. Joseph. Ann. Sc. nat., 8° sér., v, p. 448, pl. xxiii, figs. 249—254. 
1909. yp s Fauvel. Bull. Inst. Oceanogr., cxlii, p. 65. 
1912. e is Crawshay. Journ. M. B. A., vol. ix, p. 347. 
