SYLLIS CORNUTA. 20J 



1875. EMersia sexoculata, Marion and Bobretzky. Ann. Sc. Nat., 6 e ser. t. ii, p. 20. 

 1879. ,, „ Marion. Ibid., t. viii, p. 18, pi. xv, f. 3. 



„ Syllis cornuta, Tanber. Annul. Danic, p. 94. 

 1885. EMersia cornuta, Langerhans. Zeitsch. £. w. Zool., Bd. xl, p. 247. 



„ ,, „ Carus. Fauna Medit., p. 228. 



1890. „ sexoculata, Griard. Bull. Sc. Fr. Belg., t. xxii, p. 78. 



1902. „ cornuta, Mcintosh. Ann. Nat. Hist., ser. 7, vol. ix, pp. 297 and 298. 



1903. „ ,, idem. Mar. Invert. S. Africa, vol. iii, p. 37. 



1904. „ (EMersia) cornuta, Allen. Journ. M. B. A., n.s., vol. vii, p. 219. 



„ „ cornuta, Soulier. Trans. Inst. Zool., Univ. Montpellier, 2 e ser., Mem. 14, p. 39. 



1906. EMersia sexoculata, De St. Joseph. Ann. Sc. Nat., 9 e ser., t. iii, p. 181. 



Habitat. — Dredged off the Hebrides by Dr. Grwyn Jeffreys in June and July, 1866, 

 and in 100 fathoms, St. Magnus Bay, Shetland, in the same months in 1867 ; deep-sea 

 fishing off St. Andrews (E. and R. M.) ; off Bundoran, Donegal, and Berehaven, Ireland 

 (R. I. A. Exped.). By < Porcupine,' 1869, 20—25 fathoms, No. 18. 



Mediterranean, shores of France. Finmark and Norway. South Africa. Spitzbergen. 

 Madeira. 



Head transversely ovoid with the four eyes in a large semicircle, or as Rathke puts it 

 in a single series. Palpi long, soldered at the base. Median and lateral tentacles long 

 and monilified. Tentacular cirri likewise long. 



Body about an inch long and having about 100 segments. The colour is yellowish- 

 white. 



The foot (Plate LXX, figs. 22, 22 a, and 22 b) in the anterior region bears dorsally a 

 longer cirrus than posteriorly, the former having about seventeen articulations, the latter 

 about twelve. In both the organ is tapered. The setigerous lobe is a truncated cone, 

 bifid at the tip, with the spines (one is large) piercing the upper angle. Of these about 

 four are present in front and two posteriorly. The bristles (Plate LXXIX, figs. 16, 16 a, 

 and 16 b) are characteristic. Whilst the shafts correspond with the type the tips of the 

 dorsal series quite differ, being elongate, tapered, slightly curved, and ending in a minutely 

 bifid tip. There are three or four of these in each foot. The edge is minutely spinous. 

 In the posterior feet these processes are shorter and stouter. The other bristles have a short 

 terminal piece, minutely bidentate, and with a spinous edge (Plate LXXIX, figs. 16 a and 

 16 b). Slight differences exist between those procured in Donegal Bay (fig. 16 b) and those 

 from Shetland (fig. 16), the bifid condition of the bristles in the latter being most distinctly 

 marked, as it also is in the posterior bristles of the southern forms. 



The inferior lobe is sausage-shaped anteriorly, and has a downward curve, its con- 

 vexity being dorsal. The tip extends as far outward as the fleshy part of the setigerous 

 region. In the posterior feet the lobe is more pointed. 



The characteristically large spines of this species are a feature of moment, especially 

 towards the posterior region, where one is so prominent. In certain varieties the 

 elongation of the ventral cirrus is noteworthy. . 



It is doubtful whether the form mentioned by Dr. Johnston was this species. In Dr. 



83 



