CERATONEREIS FAKARAVAE. 213 



Nereis pelagica Linne. 



Syst. nat., ed. 10, 1758, 1, p. G54; Blainville, Diet. sci. nat., 1828, 57, p. 470; QuATRKFAciios, Hist. 



nat. annolcs, 18G5, 1, p. 542; Ehleks, Borstcmviirmor, 1808, p. 511, pi. 20, fi(^. 11-20; McIntosh, 



British annelids, 1910, 2, pt. 2, p. 207, pi. 52, fig. 1, 2, pi. GO, fig. 6, Ga, pi. 71, fig. 7, 7i, pi. 80, fig. 



25, 25b. 

 Nereis f err uginca Gunner, Skrift. Kjobenb. selskab., 1770, 10, p. 1G9, pi. c, fig. 10. 

 Nereis verrucosa O. F. Mijllek, Zool. Danica prodr., 177G, p. 217. 

 Nereis fimbriata O. F. MIjller, Op. dt., 177G, p. 217. 



Nereis margaticera Blainville, Op. dt., 1828, 57, p. 470; Qu.\TREEA(iEs, Op. dt., 18G5, 1, p. 510. 

 Lycoris margaritacea Johnston, Zool. journ., 1829, 4, p. 420. 

 Lycoris viridis Johnston, Op. dt., 1829, 4, p. 419. 

 Nereis fulgens Dalyell, Pow. creat., 1853, 2, p. 153, pi. 22, fig. G-8. 

 Heteronercis arctica Oersted, Nat. tids., 1842, 4, p. 117 (cpitokous female). 

 I Jeter oner eis assimilis Oersted, Op. cit., 1842, 4, p. 117 (epitokous female). 

 Nerds renalis Johnston, Ann. nat. hist., 1840, 5, p. 17G (epitokous male). 

 Heteronereis arctica Oersted, Gronlands Annulata dorsibranchiata, 1843, p. 179, fig. 50, 51, 60, G5, G8, 



70 (epitokous male). 

 INerdlepas fusca Oersted, Annulatorum Danicorum conspectus, 1843, p. 21, fig. 49, 50 (epitokous 



female) . 

 Nerds grandifolia H. Rathkb, Beitr. fauna Norweg., 1843, p. 155, pi. 7, fig. 13, 14 (epitokous male). 

 Nerds denticulata Stimpson, Invertb. Grand Manan, 1853, p. 33, fig. 23 (epitokous female). 

 Nereis reynavdi Quatrefages, Op. dt., 1865, 1, p. 519. 

 Nerds bowerbanckii Quatrefages, Op. dt., 1865, 1, p. 541. 



Locality. Two specimens in the collection bear simply the label "Alba- 

 tross, 1886." They doubtless come from the Atlantic North American Coast, 

 and probably off southern New England. 



The species is common off both shores of the Atlantic and occurs also in the 

 Pacific. It is found between tide-marks and at moderate depths. 



Ceratonereis Kinberg. 



Ofvers. K. vet. akad. Forh., 1865, no. 4, p. 170; St. Joseph, Ann. sci. nat., 1897, ser. 5, 8, p. 285. 

 Nerds {Ceratonereis) Gravier, Nouv. arch. Mus. hist, nat., 1900, ser. 4, 2, p. 157, 172. 



Ceratonereis fakaravae, sp. nov. 

 Plate 35, fig. 6-8. 



The type-specimen bears eighty-eight pairs of fully developed parapodia 

 in addition to three smaller pairs on a regenerating caudal tip. Length 65 mm. ; 

 greatest width between bases of the parapodia (third and fourth somites), 4 

 mm. ; between tips of parapodia at same point, about 5.25 mm. 



Prostomium clearly wider than long, in a ratio of about five to four. Pre- 

 ocular portion rectangular, abruptly and considerably narrower than the ocular, 

 which is narrowed forwards and has its anterior margin semicircular, marked 



