ASYCHIS BICEPS. 



349 



Maldane 



Synonyms. 



1861. Clymene biceps, Sars. Nyt Mag. f. Naturvid., ii, vol. xi, p. 257. 

 idem. Christ. Vid.-Selsk. Forh., p. 93. 

 De Quatrefages. Annel., t. ii, pp. 657 and 665. 

 Malmgren. Nord. Hafs- Annul., p. 188. 

 idem. Annul. Polychast., p. 98, Tab. xi, fig. 58. 

 Sars. Christ. Vid.-Selsk. Forh., p. 10 (sep. copy). 

 Mcintosh. Ann. Nat. Hist., ser. 4, vol. xiv, p. 203. 

 idem. Invert, and Fishes St. Andrews, p. 127. 

 idem. Trans. Linn. Soc, ser. 2, vol. i, p. 507. 

 Tauber. Annul. Danica, p. 121. 

 Levinsen. Vidensk. Meddel. Nat. For., p. 145. 

 Bidenkap. Christ. Vid.-Selsk. Forhandl., p. 116. 

 Michaelsen. Polych. deutsch. Meere., p. 142. 

 Arwidsson. Skand. u. arktisch. Maldan., p. 263, Taf. vi, figs. 200 — 207, Taf . x, 



figs. 339-344. 

 Bidenkap. Zool. Anzeiger, Bd. xxxiii, p. 275. 

 Fauvel. Bull. Inst. Ocean., no. 142, p. 12. 

 idem. Ibid., no. 194, p. 30. 



Mcintosh. Ann. Nat. Hist., ser. 8, vol. xi, pp. 112, 128. 

 Nolte. Wiss. Meeresuntersuch., n.f., Bd. xv, p. 61, Taf. i, figs. 23—24. 

 Fauvel. Bull. Mus. Hist. Nat., t. xix, no. 2, p. 10. 



1865 

 1866 

 1867 

 1868 

 1874 

 1875 

 1878 

 1879 

 1883 

 1894. 

 1897, 

 1906 



1908, 

 1909, 

 1911, 

 1913, 



Asychis 



)) 

 Maldane 



Asychis 



Habitat.— Dredged by the < Knight Errant,' in 35 to 37 fathoms, off Castle Walker, 

 Loch Linnhe, September 7th, 1882. 



Not uncommon in Norwegian waters, and extending to Greenland and Iceland, as well 

 as to Sweden and Finmark; 300 fathoms off Norway (Sars). 



The cephalic plate (Pate CI, fig. 7) slopes downward and forward as in allied forms, 

 but the entire border as well as its surface differs from that of its allies. Thus the frontal 

 margin is almost the breadth of the body and is entire, and behind it ventrally is the 

 mouth in the form of a longitudinal slit from the anterior edge of which a line slopes 

 backward and outward on each side. Three large serrations occur on each side between 

 the cleft at the margin of the ventral edge and the deep lateral fissure, one of these 

 processes occasionally being bifid. The deep furrow from the fissure proceeds as far as 

 the first bristle-tuft. The rest of the lateral margin and the posterior edge of the cephalic 

 plate are cut into a continuous series of small serrations about eighteen in number. In 

 small examples there are fewer, viz. from eight to twelve. The surface of the cephalic 

 plate has a flat ridge in the centre, but it does not reach either the anterior or the posterior 

 border. The nuchal organ forms on each side a slightly flattened semicircle, commencing 

 anteriorly at the cleft of the frontal plate, then curving inward and running parallel to 

 the median ridge, and again bending outward to the groove at the deep lateral fissure. 



Immediately behind the mouth is a broad rectangular band of glands bounded 

 laterally by the groove from the deep fissure of the cephalic plate. Glandular tissue also 

 appears around the mouth. The next segment has a collar with a free edge in front of 

 the bristle-tuft, a narrow ring behind completing the segment. Both are glandular, 

 dorsally and ventrally. 



