ODONTOSYLLIS FULGITrlANS. 



179 



bristles is smooth. The terminal process is comparatively short, ends in a strong hook, 

 and after an interval has a smaller process about the middle of the curve. Ventral cirrus 

 ovate, its bluntly- conical tip being less prominent than the setigerous region. 



Synonyms. 



1756. Noctiluca marina, Adler. Amoenitates Acad., p. 202 (with fig. in text). 



1761. Nereis noctiluca, Linnaeus. Fauna Suecica, II Edit., pp. 509 and 2098. 

 1767. „ „ idem. Syst. Nat., ed. 12, i, pt. 2, p. 1085. 



1787. „ „ Pennant. Brit. Zool., IY, p. 46; and edit. 1812, IV, p. 93. 



1791. „ „ G-melin. Linn. Syst, Nat., ed. 13, i, pt. vi, p. 3115. 



1806. „ „ Turton. Linn. Syst. Nat., IV, p. 86. 



1807. „ „ idem. Brit. Fauna, p. 134. 

 1817. „ „ Stewart. Elem., I, p. 390. 



1833. Syllis fulgurans, Audouin and Edwards. Ann. Sc. Nat., t. xxix, p. 229. 



1834. Nereis noctiluca, idem. Annel., p. 209. 

 „ Syllis fulgurans, idem. Ibid., p. 207. 



1851. „ „ G-ruhe. Fam. Annel., p. 62. 



1853. Nereis noctiluca, Daly ell. Pow. Creat., ii, p. 161. 



1864. Odontosyllis fulgurans, Claparede. Grlanures, etc., p. 95, pi. viii, f. 1. 



1865. ,, „ De Quatrefages. Annel., ii, pp. 24 and 648. 



1874. „ virescens, Marenzeller. Adriat. Annel., April, 1874, p. 41, Taf. iv, f. 2. 



1875. „ fulgurans, Marion and Bobretzky. Ann. Sc. Nat., 6 e ser., t. ii, p. 40, pi. iv, 



f. 11, 11a. 

 1879. „ „ Langerhans. Zeitsch. f. w. Zool., xxxii, p. 554. 



„ ,, „ Webster. Annel. Yirg. Coast, Trans. Alb. Instit., ix, p. 220 (sep. 



copy, 20). 

 idem. 32nd Eep. N. Y. Mus. Nat. Hist., p. 109. 

 1885. „ „ Cams. Fauna Medit., p. 231. 



1887. „ „ De St. Joseph. Ann. Sc. Nat., 7 e ser., t. i, p. 175. 



1890. „ „ Giard. Bull. Sc. Fr. Belg., t. xxii, p. 79. 



„ „ „ Malaquin. Annel. Boulon, p. 36. 



1904. „ „ Allen. Journ. M. B. A., n.s., vol. vii, p. 219. 



Habitat. — Under an Ascidian fixed to a littoral stone between tide-marks, Herm. 

 It was observed in the dnsk, when tearing off the Ascidian, by its bright green phos- 

 phorescence. Dredged by Dr. Gwyn Jeffreys in St. Magnus Bay, Shetland, in 100 

 fathoms in 1867. Dredged at Plymouth (Dr. Allen). 



Mediterranean (including the Adriatic) and the Atlantic. Amidst tubes of Dasychone, 

 Marseilles (Marion and Bobretzky). Common at Dinard (De St. Joseph). Virginian 

 Coast, dredged in 6 — 12 fathoms on shells and stones; pelagic male on surface, New 

 Jersey (Webster). 



The specimen is unfortunately imperfect, so that only a brief account can be given. 

 In the general outline of the fragment the body resembles Autolytus, the dorsal cirri being 

 smooth, and they are slightly longer than in A. prolifer, from which they differ also in 

 the absence of the distinct basal joint (ceratophore). The basal region is somewhat 

 constricted, and it dilates a little beyond this and again slightly tapers towards the tip. 



