426 EUNICE FASCIATA. 



surface. Two white spots behind the median tentacle and one in front of it. Eyes 

 at the base of the inner (posterior) paired tentacles, Body 6 to 9 ins. long, pale 

 brownish red, with a dorsal streak from the blood-vessel and variegated with regular 

 white markings. Anal cirri are enlivened with white grains and olive-brown bars. 

 Second segment equal to about two-and-a-half of the succeeding, with a shield-shaped 

 white spot in the centre of the anterior border, and two at each side. The next (also 

 a footless segment) bears the tentacular cirri, and is marked by a central white spot and 

 one on each side. The tentacular cirri have four olive-brown rings toward the distal 

 half. The third body-segment is the type of the succeeding, having a white spot in the 

 centre and three or four on each side, so that in series three longitudinal rows occur on 

 each side anteriorly. The dorsal cirri are whitish. 



Proboscis has the maxillae moderately curved, and of a chocolate-brown hue, with a 

 dark edge to the flange posteriorly in front of the spatulate appendages. The left great 

 dental plate has seven teeth, the right six. The right anterior plate has six teeth, and a 

 dark brown chitinous process supports it. The accessory patch on the outer side has a 

 single tooth. The left anterior (curved) plate has six teeth and a horny inner edge; 

 accessory outer plate a single tooth. The left azygos plate has seven or eight teeth. 

 Mandibles have the anterior edge sloped outward with a tooth at the inner third, and 

 are marked by concentric lines. First branchial process (a simple filament) occurs on 

 the fourth bristled segment; next three segments have two, three, and four divisions 

 of the branchial process, the eighth foot has eight divisions and the tenth about 

 twelve, so that the semi-pinnate arrangement is marked. The maximum development 

 of the branchiae takes place in the anterior third of the body. At the fortieth foot 

 the processes have diminished to nine, at the fiftieth to five, and at the seventieth 

 foot to three. Gradually diminishing in number they are represented in the caudal 

 region by a single filament as in front. At the tenth foot the branchial divisions are ten, 

 and the dorsal cirrus extends beyond the bristles. The dorsal bristles are winged and 

 tapered, and there are brush-shaped bristles at their bases. The jointed bristles have 

 shafts curved and dilated at the end, and a short terminal piece bifid at the tip and 

 with guards. The setigerous region has three yellow spines. A powerful ventral hook 

 with wings appears before the thirtieth foot, and continues to the posterior end. 



Synonyms. 



1826. Leodice fasciala, Risso. Hist. Nat. Prod, de FEurope, t. iv, p. 421. 



1833. Eunice Harassii, Aud. and Edw. Ann. Sc. nat., t. xxviii, p. 215, pi. xi, f. 5 — 7, 10, and 11. 



1834. „ ,, idem. Ann el., p. 141, pi. iii, f. 5— 7, 10, and 11. 



1838. „ „ Grube. Anat. n. Physiol. Kiemenw., p. 35, Taf. ii, f. 1—9. 



1840. „ „ idem. Actin. Echin. u. Wiirm., p. 83. 



1851. „ „ idem. Fam. Annel., pp. 44 and 123. 



1864. „ ,, Claparede. Grlannres Zoot., p. 118, pi. ii, f. 5. 

 „ „ „ Grube. Insel Lnssin, p. 79. 



1865. „ „ Johnston. Cat. Worms Brit. Mus., pp. 132 and 340. 

 „ „ „ De Qnatrefages. Hist. Annel., i, p. 307. 



,, „ fasciata, idem. Ibid., p. 330. 



