NEREIS PELAGICA. 271 



1906. Nereis pelagic a, De St. Joseph. Ann. Sc. Nat"., 9 e ser., t. iii, p. 2] 5. 



1908. „ „ Horst. Tijdschr. Nederl. Dierk. Yereen (2), xi, p. 143. 



1909. ; , „ Blwes. Journ. M. B. A., n.s., vol. viii, p. 351. 



„ „ „ Moore. Proc. U.S. Nation. Mus y vol. xxxvii, p. 137. 



Forma Epitoca. Male. 



1800. Diefaserige Nereicle, O. F. Muller. Wurm-Arten., p. 144, Tab. viii, f. 1—3. 



1840. Nereis renalis, Johnston. Ann. Nat. Hist., y, p. 176. 



1843. Heteronereis arctica, CErsted. Gronl. Annul, dors., p. 179 (27), f. 50*, 51, 60, 65, 68, 70*. 



„ Nereis grandifolia, H. Kathke. Beitrage Fauna Norweg., p. 155, Tab. vii, f. 13, 14. 

 1849. „ „ R, Leuckart. Archiv f. Naturg., Jrg. 15, Bd. i, p. 207. 



1851. ,, renalis, Williams. Rep. Brit. Assoc., p. 197. 

 1865. Heteronereis renalis, Johnston. Cat. Worms Brit. Mus., p. 163. 



,, „ arctica, De Quatrefages. Annel., i, p. 566. 



„ „ renalis, idem. Ibid., p. 580. 



Female. 



1842-3. Heteronereis arctica, CErsted. Kroner's Nat. Ticls., p. 117. 



„ „ assimilis, idem. Ibid., p. 117. 



1843. „ „ idem. Gronl. Annul. Dorsibr., p. 180, f. 54, 61, 72, 



„ ? Nereilepas fusca, idem. Annul. Panic. Consp., p. 21, f. 49, 50. 

 1853. Nereis denticulata, Stimpson. Invert. Grand Manan, p. 33, f. 23. 

 1865. Nereilepas fimbriatus, Pe Quatrefages. Annel., i, p. 559 (excl. syn.). 



„ Heteronereis assimilis, idem. Ibid., p. 566. 



„ „ „ Malmgren. Nord. Hafs- Annul., p. 108, Tab. xi, f. 15 e, c. 



1866-69. ; , arctica, Packard. Mem. Bost. Soc, Nat. Hist., i, p. 293. 



1874. „ grandifolia, Malm. Coteb. vet. o. vitt. Handl., xiv, p. 84. 



Male and Female. 

 1865. Heteronereis grandifolia, Malmgren. Nord. Hafs-Annul., p. 108, Tab. xi, f. 15 ? , £. 16, b, 



1867. ,, „ idem. Annul. Polych., p. 60, Tab. iv, f. 31. 



1873. „ „ Sars. Bidrag Christ, Fauna, p. 23 (sep. copy). 



Habitat. — Abundant in tubes under stones between tide-marks on both shores of 

 Britain and Ireland ; under layers of slaty rocks, in fissures of sandstone, in sanely mud, 

 and under old limpets. It is less common in the Channel Islands, where medium or 

 small examples are found only in chinks of rocks and under Balani and Ascidians in the 

 Grouliot Caves, Sark, a single small example of Nereis cultrifera, and one or two of 

 N. DumeHlii accompanying them. Occasionally the tube formed by it in fissures of 

 sandstone is not half the length of its body. 



Many young forms occur on the tangle-blades (Laminaria saccharina and L. digitata), 

 to the surface of which their tubes are attached, and also on Delesseria sanguined in the 

 laminarian region. It extends to the coralline ground off the East coast, and now and 

 then it takes possession of an empty tube of other forms, such as Thelepus. 



It ranges from the shores of France, though De St. Joseph found it bat seldom at 



