CIRRATULUS TENTACULATUS. 243 



grooves a ridge passes to the tip of the snout. Ventrally a deep groove leads backward 

 to the mouth, which has posteriorly a thick transverse lip. Occasionally a band of ocular 

 points crosses the posterior border of the prostomium. Body six to nine inches in length, 

 rounded dorsally, flattened ventrally, tapered anteriorly, and more distinctly but gradually 

 diminished posteriorly, the terminal anus having a small projecting process below it. 

 Colour of a dull yellowish-orange in front, and dull yellow elsewhere, enlivened by the 

 red blood-vessels. Some show vertical lines of dark pigment in the sulci at the segment- 

 junctions from the fourth segment backward for some distance. Foot has dorsal and 

 ventral setigerous processes ; the former bearing capillary bristles to the ninety-second 

 or thereabout when crotchets appear ; crotchets, on the other hand, occurring about the 

 sixty-second ventral division. Capillary bristles have stout shafts and long, flattened, 

 tapering tips with a narrow web of spines directed distaliy. Crotchets with strong 

 shafts, the neck curving backward and then forward at the tip. Branchias commence on 

 the dorsum of the first foot, and the tufts of tentacles are on crescentic areas on the 

 dorsum, between the fifth and sixth bristled segments (seventh body-segment, Carus). 

 The branchiae occur singly along each side of the entire anterior region, and are absent 

 from the last thirty or forty. 



Synonyms. 



1808. Terebella tentaculata, Montagu. Trans. Linn. Soc, vol. ix, p. 11(3, pi. vi, fig. 2. 

 1812. „ „ Pennant. Brit. Zool., ed. 4, vol. iv, p. 111. 



1817. Girratulus Lamarckii, Cnvier. Eegne Anim., t. iii, p. 205. 

 1828. Cirrinereis filigera, De Blainville. Diet. Sc. nat., t. lvii, p. 488. 



„ Lumbricus filigerus, Delle Chiaje. Memorie, vol. iii-, p. 171, Tav. xliv, fig. 1. 



1833. Cirratulus Lamarckii, Audouin and Edwards. Ann. Sc. nat., t. xxix, p. 410, pi. xv, figs. 1 — 4. 



1834. „ ,, idem, Hist. nat. Litt. France, t. ii, Annel., p. 271, pi. vii, figs. 1 — 4. 

 1836. Girrhatulua tentaculata, Templeton. Loudon's Mag. Nat. Hist., vol. ix, p. 234. 



1838. Cirratulus Lamarckii, Grube. Anat. u. Physiol. Kiemenw., p. 32. 

 „ Cirrhatulus tentaculatus , Fleming. Mag. Zool. and Bot., vol. ii, p. 73. 



1840. Girratulus Lamarckii, Grube. Actin. Echin. u. Wiirm., p. 70. 



1841. ,, ,, Delle Chiaje. Descriz., vol. iii, p. 85. 

 „ „ filigerus, idem. Ibid., p. 85. 



1847. „ Lamarckii, Cuvier. Eegne Anim., Disciples' ed., Anne]., p. 39, pi. xvii, Hg. 3. 



1851. „ „ Grube. Fam. Annel., pp. 67 and 134. 



„ „ Williams. Eep. Brit. Assoc, for 1850, pp. 200, 216, and 236. 



1864. „ „ Grube. Insel. Lussin, p. 85. 



1865. ,, tentaculatus, Johnston. Cat. Worms Brit. Mus., pp. 209 and 243. 

 „ Audouinia Lamarckii, De Quatrefages. Annel., t. 1, p. 460. 



,, ,, crassa, idem. Ibid., p. 461. 



1869. Cirratulus Lamarckii, Grube, Mitth. St. Vaast, Abb. Schles. Ges., 1869, p. 37. 

 1875. „ „ Panceri. Atti Soc. Ital., vol. xviii, p. 526. 



„ Audouinia filigera, idem. Ibid. 



1879. Girratulatus tentaculatus, Tauber. Annul. Danica, p. 120. 



1881. Audouinia filigera, Langerhans. Canarisch. Annel., p. 115. 



1883. Girratulus tentaculatus, Levinsen. Yidensk. Meddel. Nat. For., p. 111. 

 1885. „ Lamarckii, Carus. Fauna Medit., p. 247. 



