LUMBRICONEREIS LATREILLIL 377 



1868. Zygolobus tingens, Ehlers. Borstenw., ii, p. 391, Taf. xvii, f. 11—14. 



„ Lumbriconereis Nardonis, idem. Ibid., ii, p. 381, pi. xvi, f. 23—30. 



>» » :, Claparede. Annel. Nap., p. 147, pi. ix, f. 3. 



1870. Zygolobus Latreillii, Grube. Arch. f. Xaturges., xxxvi, p. 302. 



1875. Lumbriconereis Latreillii, Marion and Bobretsky. Ann. Sc. nat., 6 e ser., t. ii, p. 15. 



„ (Under L. fragilis) Ehlers. Zeitschr. f. wiss. Zool., xxv, p. 54, Taf. iii, f. 22, 23. 



„ Lumbriconereis Latreillii, De St. Joseph. Ann. 8c. nat., 6 e ser., t. ii, p. 15. 



18 ?9. „ Nardonis, Grube. Jahresb. Schles. Gesells. (for 1878), p. 90. 



„ „ tingens, idem. Ibid., p. 91. 



1885. „ Nardonis, Cams. Fauna Medit., p. 215. 



1888 - „ tingens, De St. Joseph. Ann. Sc. nat , 7 e ser., t. v, p. 21-2, pi. viii, f. 62— 64. 



1890. „ „ Malaquin. Annel. Boulon. in Rev. Biol. Nord. Fr., ii, p. 180. 



1896. „ Latreillii, Roule. Camp. < Caudan/ p. 449. 



„ ,, Nardonis. Polych. deutsch. Meere, p. 14. 



1898. „ Latreillii, De St. Joseph. Ann. Sc. nat., 8 e ser., t. v, p. 276. 



1903. „ Nardonis, Mcintosh. Ann. Nat. Hist., ser. 7, vol. xi, p. 561. 



1904. „ Latreillii, Allen. Journ. M. B. A., n.s., vol. vii, p. 226. 



1905. „ Nardonis, Graeffe. Arbeit. Zool. Stat. Triest, xv, p. 321. 



Habitat. — Not uncommon under stones between tide-marks, St. Peter Port, Guernsey, 

 and in Herm. Deep sea fishing off St. Andrews Bay, and in the stomach of the flounder 

 (E. M.). Plymouth (Allen). Loch Slyne, Co. Cork, K.I.A. Bxped., 1886. 



Naples (Claparede). Kaila Bay, Japan Sea, by Capt. St, John, 1874 (W. C. M.) ; 400 

 metres off France (Roule). Eighty-one fathoms off Cape Finisterre, ' Porcupine,' 1870. 



The head forms a short, blunt cone with a median band in the centre posteriorly 

 attached to the succeeding somite, and at each side of the latter a dimple into which 

 a projecting process of the first segment fits. The under surface in the preparations 

 generally has a median furrow. 



Body similar in appearance to that of L. fragilis, being slightly diminished anteriorly, 

 and tapered posteriorly, ending in four cirri, which appear (in reproduced tails at any rate) 

 to arise by the bifurcation of two — one at each side of the vent — and there is nothing to 

 contra-indicate this in the fully developed tail. 



The first segment is slightly wider than the second. The two papillae in front of the 

 mouth are transversely elongated. The general aspect of the segments and feet resembles 

 that in L. fragilis, the posterior flap of the foot projecting outward, and being slightly 

 probe-pointed when seen from above. 



The dental apparatus l has superiorly a pair of strongly curved and rather short 

 maxillae, the basal plates of which trend to a short posterior lozenge (Plate LXV, fig. 12). 2 

 The great dental plates have each four teeth, and the antero-lateral a tooth each. A 

 horny patch lies to the outer side of the antero-lateral, and a horny bar outside the anterior 

 half of the maxillae. The mandibles (Plate LXV, fig. 12 a) have spatulate anterior ends, 

 anchylosed in a wide V, and two short roots. 



The pedicle of the nerve-cords is somewhat long. 



The first foot has a short, bluntly conical posterior flap and three pale spines. It 



1 In a female of moderate size. 



3 In the description of Plate LXV, fig. 12, Nardonis has been entered for Latreillii. 



105 



