498 ARICIA CUVIERL 



rosette. Feet dorsal in position, the ventral cirrus being dorso-lateral. Posteriorly body 

 tapers to a blunt point with the anus at the tip dorsally, and with two very long and very 

 slender cirri arising at the anterior part of it. 



The first region of the body comprises twenty-one feet, but these vary considerably 

 amongst themselves, commencing with a rudimentary foot anteriorly and ending in 

 modified feet toward the twenty-first. From the sixth foot backward the posterior of 

 the three rows of ventral bristles is darker, and is composed of spines increasing in 

 strength, so that they form a conspicuous row of brown dots. The foot becomes more 

 free and the posterior row of papillae more conspicuous, extending ventrally beyond the 

 bristles at the seventeenth foot. From the nineteenth to the twenty-fourth these papillse 

 go to the mid-ventral line. The rows of ventral bristles attain their maximum about the 

 fifteenth or sixteenth foot. The dorsal cirrus increases in size in its progress backward 

 and has an enlargement at the base. The branchiae commence at the fifth foot, and are 

 of a rich red colour in life. In the succeeding region of the body (at and after the 

 twenty- second foot) the dorsal division has in front a long tuft of serrated and slightly 

 camerated bristles, and behind is a large dorsal cirrus with blood-vessels. Below, after an 

 interval, is a smaller cirrus, also with a distinct vessel. The ventral division consists of a 

 setigerous process with a long papilla (ventral cirrus ?) and a few very slender bristles of 

 the same type as the dorsal. The camerated or peculiarly serrated bristles disappear 

 posteriorly, long simple tapering bristles taking their places in both divisions of the foot. 



Synonyms. 



1833. Aricia Cuvieri, Audouin and Edwards. Ann. Sc. nat., t. xxix, pi. xv, f. 5 — 13. 



1834. „ „' idem. Annel. (Faun. Lit. Fr. ii), p. 258, pi. vii, f. 5—13. 

 1837. „ „ M. Edwards. Regne Anim. Illust., pi. xvii, f. 1. 



1840. ,, „ Grube. Actin. Echinod., etc., p. 69. 



1851. ,, „ idem. Fam. Annel., pp. 68 and 135. 



1865. „ ,, De Quatrefages. Annel., ii, p. 283. 



1867. „ „ Malmgren. Annul. Polycli., p. 71. 



1869. „ „ Mcintosh. Rep. Brit. Assoc. (1868), p. 339. 



1873. „ ., Sars. Bidrag Christ. Fauna, iii, p. 31, Tab. xviii, f. 17—23. 

 „ „ ,, Willemoes-Suhm. Zeitschr. f. wiss. Zool., Bd. xxiii, p. 348. 



1874. „ „ Mcintosh. Ann. Nat. Hist., ser. 4, vol. xiv, p. 200. 

 9} „ ,, Malm. Goteb. vet. o. vitt. Handl., xiv, p. 91. 



1875. „ „ Mcintosh. Invert, and Fishes St. Andrews, p. 124. 

 1879. „ „ Tauber. Annul. Danic, p. 106. 



1893. „ „ Levinsen. Vidensk. Ud. "Hauchs," p. 336. 



1904. „ „ Allen. Journ. M. B. A., n.s., vii, p. 227. 



1905. ,. „ Mcintosh. Ann. Nat. Hist., ser. 7, vol. xv, pp. 44 and 50. 



1906. „ „ De St. Joseph. Ann. Sc. nat., 9 e ser., t. iii, p. 167. 



Habitat. — Dredged in twelve fathoms west of Peel, Isle of Man ; ' Porcupine ' 

 Expedition of 1869 in 164 fathoms, on a bottom of greyish sand, stones and coral; and 

 in same Expedition at a depth of 422 fathoms; ' Porcupine ' Expedition, 1870, Station 

 VI, Lat. 48° 26' N., Long. 9° 44' W., in 358 fathoms on sand, bottom temperature 50°. 

 At Station VIII, in 257 fathoms ; Royal Irish Academy's Expedition to S.W. Ireland, 

 No. 122. 



