MAPPHYSA BELLI. 449 



nineteen divisions, and the last about thirteen. Foot with a short dorsal cirrus in front, 

 more elongated in the branchial region and posteriorly, a short bluntly conical setigerous 

 region with two or three blackish-brown spines in front, and bristles of three kinds, viz., 

 simple tapering dorsal bristles, compound falcate bristles with narrow terminal pieces 

 which are bifid and winged, and thirdly, a few compound forms with tapering terminal 

 pieces as in Marphysa sanguinea. This type of foot extends to the end of the branchial 

 region. The posterior foot has also the three kinds of bristles — considerably diminished 

 posteriorly — but has, in addition to the black spine, one or two long, bifid winged hooks 

 (modifications of spines) which slightly slant downward. 



Synonyms. 



1833. Eunice Bellii, Audouin and Edwards. Ann. Sc. nat., l e ser., t. xxvii, pi. ii, f. 1 — 4, 8,9 ; t. xxviii, 



p. 223. 



1834. „ „ idem. Annel., p. 149, pi. iii, f. 1—4, 8, and 9. 



1836 — 7. Eunice Belli, idem. Cuvier, Regne Anim:, 2 e eel., iii, p. 200 (note). 



1851. Eunice Bellii, G-rube. Fam. Annel., pp. 44, 123. 



1865. Marphysa Belli, De Quatrefages. AnneL, i, p. 333. 



1869. „ „ G-rube. Mittli. St. Vaast-la-Hongue, p. 36. 



1874. „ Bellii, Marenzeller. Adriat. Ann el., p. 59. 



1885. „ ,, Cams. Fauna Medit., p. 213. 



1887. „ „ Elders. Florida Annel., p. 95, Taf. xxviii, f. 1—8. 



1902. „ „ Marenzeller. Potychset. des Grundes (Kaiserlichen Akad.), p. 17. 



1903. „ „ Mcintosh. Ann. Nat. Hist., ser. 7, vol. xi, p. 560. 



1904. „ „ Allen. Journ. M. B. A., N.s., vii, p. 225. 



1905. „ „ Graeife. Arbeit. Zool. Stat. Triest, xv, p. 321. 



Habitat. — Under a stone near low water-mark of ordinary tide near the boatman's 

 house, Herm (1868). Plymouth (Allen). 

 / . Shores of France. Mediterranean. American shores (Ehlers). 



Head (Plate LX, fig. 12) bluntly conical, evenly rounded in front, with scarcely a 

 trace of a notch dorsally, but with a well-marked ventral median groove— probably 

 indicating the palpi. The median and two lateral tentacles are proportionally long and 

 slightly crenate, the median exceeding the others in length. A small eye lies at the base 

 of the inner lateral tentacle — externally. The mouth presents a median frill at the 

 posterior end of the groove of the snout and a prominent and rounded posterior lip. The 

 peristomial segment is twice the breadth of the others, the footless segment succeeding it 

 being of the normal breadth. At its ventral edge it is somewhat coarsely crenate. 



Body 6 — 7 ins. long — attenuated for a Bunicid, so that at first sight it resembles 

 Lumbriconereis ; slightly tapered towards the head, and ending in a slender tail. It is 

 somewhat reddish anteriorly and highly iridescent throughout. Behind the branchiae is a 

 dark purple central streak from the blood-vessel, the rest being iridescent fawn-colour. 



The maxillae (Plate LXV, fig. 11) are greyish or pale chocolate at the base, the 

 curved fang anteriorly being blackish brown. A dark line separates them from the basal 

 processes, which are somewhat elongate, the outer border sloping inward, then forming an 

 elevation, and lastly curving to a slipper-shaped tip. The tips and inner edges are dark, 



114 ■ 





