MYRIOCHELE HEERI. 365 



1. Myrioohele Heebt, Malmgren, 1867. Plate OX, figs. 10 and 10 a— bristle and hook; 



Plate CXI, figs. 7 and 7 a — head and body. 



Specific Characters. — Head bluntly rounded or slightly enlarged; anterior end 

 obliquely truncated, with the mouth in the centre of the combined cephalic and buccal 

 region. Body of two regions, the anterior of three bristled segments, which differ from 

 those of Owenia in so far as all the bristles project laterally. The second region is 

 more or less cylindrical anteriorly, a little narrowed posteriorly, and ending in a slightly 

 tapering tail, with the anus in the centre. Setigerous segments about twenty-seven, 

 the fascicles of bristles becoming longer posteriorly, and all having sparse spikes distally 

 — directed toward the tip. The tori are crowded with bifid hooks. 



Tube from 2 to 4 in. in length, the anterior end slightly tapered, and the posterior 

 extended as a long and often flattened process. It is composed of sand-grains on a lining 

 of secretion, and often has a ferruginous hue, but this mainly depends on the site, as some 

 have mixed white and black sand-grains, and other minute fragments of shells which are 

 set on edge in contracted examples. 



Synonyms. 

 1867. Psammocollus, Grrube. Novara-Annel., p. 30, and Annul. Semperiana, p. 203. 



„ Myrioohele Eeeri, Malmgren. Annul. Polych., p. 101, Taf. vii, fig. 37. 

 1875. „ „ Elders. Zeitschr. f. wiss. Zool., Bd. xxv, p. 27. 



1879. ,, ,, Tauber. Annul. Danica, p. 125. 



1880. „ ,, Langerlians. Zeitschr. f. wiss. Zool., Bd. xxxiv, p. 104. 



1882. ? „ Sarsi, Hansen. Norske ISTord.-Exped., p. 41, Taf. vi, figs. 6—11. 

 ,i ,, Danielsseni, idem. Ibid., p. 42, Taf. vi, figs. 13 — 14. 



1883. „ Eeeri, idem. Vidensk. Meddel. Nat. For., p. 148. 



1885. „ „ Mcintosh. ' Challenger ' Annel., p. 410, pi. xxv a, fig. 14. 



1886. „ „ Levinsen. Kara-Havets, etc., p. 11. 

 1893. „ ,, idem. Kanonb. " Hauchs," p. 345. 



1897. „ „ Michaelsen. Polych. deutsch. Meere., p. 144. 



1898. „ „ idem. G-ronland. Annel., p. 128. 



1907. „ „ Fauvel. Bull. Inst. Ocean., t. xix, no. 107, p. 30. 



1913. „ „ idem. Bull. Mas. Hist. Nat., no. 2, p. 9. 



1914. „ ., Southern. Proc. Boy. Irish Acad., vol. xxxi, no. 47, p. 106. 



Habitat. — Stomach of the haddock, St. Andrews Bay, 1864 (B. M.) ; dredged in 

 Clew Bay, Ireland, in 16 to 17 fathoms, Station W. 1 55, August, 1910 (Southern) l ; S.W. 

 Ireland, Station 5, 1885 (Royal Irish Acad.). 



Abroad it occurs in Greenland, Spitzbergen, Safehavn, etc. (Malmgren) ; Spitz- 

 bergen (Fauvel) ; abundant in the Gulf of St. Lawrence, Canada, Station No. 9, 35—42, 

 1873 (coll. Dr. Whiteaves); Madeira, 30 fathoms (Langerhans) ; ? North Atlantic (Hansen). 



Head and buccal segment (Plate CXI, figs. 7 and 7 a) are often somewhat enlarged 



in lateral view, whilst from the dorsum they form a bluntly -cla vat e process with a 



constriction behind. In others this region slightly projects all round. The mouth opens 



on the ventral surface as a large circular aperture immediately behind the tip of the 



1 Mr. Southern kindly forwarded specimens for examination. 



