1. Species Nemertes annellata Leuckart, 1849 accepted as Cerebratulus annellatus (Leuckart, 1849) (unaccepted > superseded combination)
2. Species Nemertes annulatus Ehrenberg, 1831 accepted as Nemertes annulata Ehrenberg, 1831 (unaccepted > misspelling - incorrect original spelling)
3. Species Nemertes assimilis Örsted, 1843 accepted as Cerebratulus assimilis (Örsted, 1843) accepted as Paradrepanophorus crassus (Quatrefages, 1846) (unaccepted > superseded combination)
4. Species Nemertes badia (Rathke, 1799) accepted as Drepanophorus spectabilis (Quatrefages, 1846) (Synonym)
5. Species Nemertes borlasii Cuvier, 1817 accepted as Lineus longissimus (Gunnerus, 1770) (unaccepted > junior subjective synonym)
6. Species Nemertes camillea (Quatrefages, 1846) accepted as Emplectonema neesii (Örsted, 1843) accepted as Neesia neesii (Örsted, 1843) (unaccepted > junior subjective synonym)
7. Species Nemertes cartinophilos Kölliker, 1845 accepted as Carcinonemertes carcinophila (Kölliker, 1845) (unaccepted > superseded combination, synonym)
8. Species Nemertes collaris Schmarda, 1859 accepted as Lineus collaris (Schmarda, 1859) (synonym)
9. Species Nemertes communis van Beneden, 1861 accepted as Lineus ruber (Müller, 1774) (unaccepted > junior subjective synonym)
10. Species Nemertes complanatus Kölliker, 1845 accepted as Cerebratulus complanatus (Kölliker, 1845) (basionym)
11. Species Nemertes coronata (Quatrefages, 1846) accepted as Tetrastemma coronatum (Quatrefages, 1846) (unaccepted > superseded combination)
12. Species Nemertes crassa (Quatrefages, 1846) accepted as Paradrepanophorus crassus (Quatrefages, 1846) (unaccepted > superseded combination)
13. Species Nemertes delineatus (Delle Chiaje, 1825) accepted as Baseodiscus delineatus (Delle Chiaje, 1822) (unaccepted > superseded combination, synonym)
14. Species Nemertes drepanensis Huschke, 1830 accepted as Notospermus geniculatus (Delle Chiaje, 1822) (synonym)
15. Species Nemertes duoni Joubin, 1890 accepted as Emplectonema duoni (Joubin, 1890) (synonym)
16. Species Nemertes ehrenbergii Kolliker, 1845 accepted as Tetrastemma candidum (Müller, 1774) (synonym)
17. Species Nemertes fumosa (Quatrefages, 1846) accepted as Prosorhochmus claparedii Keferstein, 1862 (unaccepted > junior subjective synonym)
18. Species Nemertes fusca (Fabricius, 1780) accepted as Lineus ruber (Müller, 1774) (synonym)
19. Species Nemertes fuscescens (Fabricius, 1774) accepted as Lineus ruber (Müller, 1774) (synonym)
20. Species Nemertes geniculata accepted as Notospermus geniculatus (Delle Chiaje, 1822) (synonym)
21. Species Nemertes glauca Kölliker, 1845 accepted as Emplectonema gracile (Johnston, 1837) (unaccepted > junior subjective synonym)
22. Species Nemertes glaucus Kölliker, 1845 accepted as Emplectonema gracile (Johnston, 1837) (unaccepted > junior subjective synonym, synonym)
23. Species Nemertes gracilis Johnston, 1837 accepted as Emplectonema gracile (Johnston, 1837) (Synonym)
24. Species Nemertes gracilis Goodsir, 1845 accepted as Emplectonema gracile (Johnston, 1837) (unaccepted > junior subjective synonym)
25. Species Nemertes haematodes Diesing, 1850 accepted as Tetrastemma flavidum Ehrenberg, 1828 (unaccepted > unavailable name)
26. Species Nemertes hemprichii Ehrenberg, 1831 accepted as Baseodiscus hemprichii (Ehrenberg, 1831) (unaccepted > superseded combination)
27. Species Nemertes hermaphroditicus Gibson, 1982 accepted as Tetranemertes hermaphroditicus (Gibson, 1982) accepted as Tetranemertes hermaphroditica (Gibson, 1982) (synonym)
28. Species Nemertes humilis (Quatrefages, 1846) accepted as Tetrastemma humilis (Quatrefages, 1846) accepted as Tetrastemma humile (Quatrefages, 1846) (unaccepted > superseded combination)
29. Species Nemertes knochii Kölliker, 1845 accepted as Tetrastemma knochii (Kölliker, 1845) (synonym)
30. Species Nemertes krohnii Siebold, 1850 accepted as Tetrastemma knochii (Kölliker, 1845) (synonym)
31. Species Nemertes lactiflorea (Johnston, 1828) accepted as Amphiporus lactifloreus (Johnston, 1828) (synonym)
32. Species Nemertes ligurica accepted as Cerebratulus liguricus Blanchard, 1849 (synonym)
33. Species Nemertes mandilla (Quatrefages, 1846) accepted as Amphiporus lactifloreus (Johnston, 1828) (unaccepted > junior subjective synonym)
34. Species Nemertes marioni Hubrecht, 1879 accepted as Emplectonema marioni (Hubrecht, 1879) (synonym)
35. Species Nemertes melanocephala Johnston, 1837 accepted as Tetrastemma melanocephalum (Johnston, 1837) (synonym)
36. Species Nemertes multioculatus Kölliker, 1845 accepted as Amphiporus multioculatus (Kölliker, 1845) (unaccepted > superseded combination, synonym)
37. Species Nemertes octoculata Keferstein, 1862 accepted as Lineus ruber (Müller, 1774) (unaccepted > junior subjective synonym)
38. Species Nemertes octoculata (Johnston, 1828) accepted as Lineus ruber (Müller, 1774) (unaccepted > junior subjective synonym)
39. Species Nemertes opaca (Quatrefages, 1846) accepted as Lineus ruber (Müller, 1774) (unaccepted > junior subjective synonym)
40. Species Nemertes pachyrhyncha Schmarda, 1859 accepted as Cerebratulus pachyrhynchus (Schmarda, 1859) (synonym)
41. Species Nemertes polymorpha accepted as Tubulanus polymorphus [Renier], [1804] (synonym)
42. Species Nemertes polyophthalma Schmarda, 1859 accepted as Lineus polyophthalmus (Schmarda, 1859) (synonym)
43. Species Nemertes pulchra Johnston, 1837 accepted as Nipponnemertes pulcher (Johnston, 1837) accepted as Nipponnemertes pulchra (Johnston, 1837) (synonym)
44. Species Nemertes quadrioculata (Johnston, 1828) accepted as Tetrastemma candidum (Müller, 1774) (synonym)
45. Species Nemertes quatrefagei Rochebrune, 1881 accepted as Emplectonema quatrefagei (Rochebrune, 1881) (synonym)
46. Species Nemertes quatrefagii Beneden, 1861 accepted as Lineus longissimus (Gunnerus, 1770) (unaccepted > junior subjective synonym)
47. Species Nemertes rubrolineata Kirsteuer, 1965 accepted as Tetranemertes rubrolineata (Kirsteuer, 1965) (synonym)
48. Species Nemertes rufa (Rathke, 1843) accepted as Lineus ruber (Müller, 1774) (unaccepted > junior subjective synonym)
49. Species Nemertes rufifrons Johnston, 1837 accepted as Cephalothrix rufifrons (Johnston, 1837) (basionym)
50. Species Nemertes spectabilis (Quatrefages, 1846) accepted as Drepanophorus spectabilis (Quatrefages, 1846) (unaccepted > superseded combination)
51. Species Nemertes supera accepted as Tubulanus superbus (Kölliker, 1845) (synonym)
52. Species Nemertes superbus Kölliker, 1845 accepted as Tubulanus superbus (Kölliker, 1845) (basionym)
53. Species Nemertes vermiculus (Quatrefages, 1846) accepted as Tetrastemma vermiculus (Quatrefages, 1846) (unaccepted > superseded combination)
54. Species Nemertes verrilli Girard, 1893 accepted as Zygonemertes virescens (Verrill, 1879) (synonym)
55. Species Nemertes viridis (Müller, 1774) accepted as Lineus viridis (Müller, 1774)
56. Species Nemertes annulata Ehrenberg, 1831 (uncertain > nomen dubium)
57. Species Nemertes bilineatus sensu Örsted, 1844 (uncertain > nomen dubium)
58. Species Nemertes coeca Örsted, 1845 accepted as Meckelia coeca Örsted, 1845 (uncertain > nomen dubium, Included as a dubious species of heteronemertean by Bürger (1904a: 127).)
59. Species Nemertes dubia (Quatrefages, 1846) (uncertain > nomen dubium)
60. Species Nemertes maculosa Ehlers, 1871 (uncertain > nomen dubium, Included by Bürger (1904a: 128) among a group of dubiously valid heteronemertean taxa.)
61. Species Nemertes nigrofuscus Ehrenberg, 1831 (uncertain > nomen dubium, Included by Bürger (1904a: 128) among a group of dubiously valid heteronemertean taxa.)
62. Species Nemertes roseus Kölliker, 1845 (uncertain > nomen dubium)
63. Species Nemertes teres Ehlers, 1871 (uncertain > nomen dubium)

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