390 POLYNOE SCOLOPENDRINA. 



papilla of the latter are long. Scales fifteen pairs, dappled brownish, with a dark patch 

 over the scar and surrounded by a pale ring. The larger examples have a dark metallic 

 lustre from the pigment. They have a series of minute papilla? as a broad belt along the 

 anterior region, and the outer edge shows very minute rounded or short clavate papilla? 

 — the homologues of the cilia. The dorsal division of the foot is minute, and bears 

 rather small, spinous, truncated bristles. Ventrally, as a rule, a single strong hastate 

 bristle occurs superiorly, and, below, a series of strong bifid bristles with short spinous 

 regions. The dorsal cirri are somewhat short, with a filiform tip, and with the same 

 short cilia as on the median tentacle. The ventral cirri are short, ciliated, and tapering 

 — not reaching the tip of the fleshy part of the foot in spirit. Commensalistic. 



Synonyms. 



1820. Polynoe scolopendrina, Savigny. Syst. des Aim., p. 350. 

 1834. „ „ Aud. and Ed. Annel., p. 92, pi. i, f. 17 and 19. 



1840. „ „ Johnston. Ann. Nat. Hist., v, 307, Tab. 5, f. 1—9. 



1851. „ „ Grrube. Fam. Annel., 37. 



Sars. Yid. Selsk. Forh., 1860, p. 62. 



„ ,, variegata, Grrube. Annel. Oersted., 49. 



1860. „ scolopendrina, Sars. Yidensk. Selskab. Christ., 1860, p. 62. 

 1865. „ „ Johnston. Cat. B. M., 119, pi. xi, f. 1—9. 



Malmgren. Nord. Hafs-Ann., 82, Tab. 10, f. 11 ; and Ann. Polycli., 15. 



„ Lepidonotus scolopendrinus , De Quatrefages. Ann., i, p. 263. 



1873. Polynoe scolopendrina, Marenzeller. Sitzb. der k. Akad., vol. lxix, p. 419. 

 „ „ crassipalpa, idem. Ibid., p. 412, pi. xi, f. 1. 



„ „ Johnstoni, idem. Ibid., p. 420. 



1874. „ „ idem. Sitzb. d. k. Akad., 69 (sep. Ahd.), p. 14. 



1875. „ scolopendrina, Grrube. Jalirb. Schles. Gresells. {fide De St.-Joseph), 1875 Breslau, 



.1876, pp. 53 and 68. 



1876. „ „ Mcintosh. Trans. Z. S., ix, 389. 

 1879. „ „ Tauber. Ann. Danic., 82. 

 1883. „ „ Levinsen. Nord. Annul., 196. 



1888. „ „ De St.-Joseph. Ann. d. so. nat. (7), v, p. 183. 



1891. „ „ Hornell. Op. cit., p. 235. 



Habitat. — In the tubes of Terebella nebulosa, between tide-marks, Herm, and 

 between the chinks of rocks (gneiss) in muddy sand in the burrows of Lysidice. The 

 large race abounds on the eastern shores of North Uist in the tubes of Terebella nebulosa 

 and other Terebellids attached to the under surfaces of stones close to low- water mark. 

 Not uncommon also off the east and west coast of Ireland (Prof. Haddon and Dr. Scharff) 

 and in the English Channel (Hornell). It extends to the shores of France and to the 

 Mediterranean. 



The pinkish head (Plate XXYIII, fig. 9) forms an ovoid, the long diameter being 

 antero-posterior. A central groove terminates in front at the basal process (ceratophore) 

 of the median tentacle, and on each side is a somewhat indistinct peak, which, however, 



