PHYLLOCHATOPTERUS ANGLICUS. 475 
tips, and spear-shaped bristles, the minute and diaphanous hooks having a rounded apex, 
and a thickened anterior margin (probably roughened) and a small main fang. Tube hyaline, 
horny and ringed, fixed by the posterior end. 
SYNONYMS. 
1856. Spiochextopterus typicus, Sars. Fauna Lit. Norveg., ii, p. 1, figs. 8—21. 
1865. Bs typus, De Quatrefages. Annelés, ii, p. 217. 
1875. % typicus, Sars. Bidrag. Christ. Fauna, p. 62. 
1883. e »  lievinsen. Vid. Meddel. Nat. Forh. Copenhagen, p. 108. 
1908. oe » McIntosh. Ann. Nat. Hist., ser. 8, vol. 11, p. 535. 
1914. re »  Hauvel. Annél]. Polych. Monaco, p. 266, pl. xxv, figs. 5—9. 
1915. % McIntosh. Monogr. Brit. Mar. Annel., p. 182. 
1922. is typicus, idem. Ann. Nat. Hist., ser. 9, vol. ix, p. 16. 
_ Habiiat—Tubes occur in St. Andrews Bay (E. M.), Loch Linnhe, in 35—37 fathoms 
(J. G. J.). 
Distribution.—Shores of Norway (Sars) ; Gulf of St. Lawrence, Canada (W. C. M.). 
Kach segment posteriorly in the sole imperfect example secured (Loch Linnhe) has 
dorsally a pair of setigerous processes bearing a group of about four bristles, with long shafts 
and flattened spear-like tips. Two flaps or lamelle occur laterally below the foregoing and 
bear very transparent hooks (Plate CXXXVIII, fig. 14), the outline of which is somewhat 
triangular, with a rounded apex, a thickened anterior margin, which is probably minutely 
serrated, though in the preparations such was not seen, and ending inferiorly in a short 
main fang. The transparency of these organs renders it difficult to make out their outlines, 
and they escaped Sars. 
Genus PHYLLOCHATOPTERUS, Grube, 1863. 
Prostomium small, bearing eyes. Peristomium forms a well-developed funnel, and bears 
a pair of tentacles of variable length, and a pair of small, flat structures apparently 
homologous with these, and generally covering the eyes. Collar shallow and incomplete 
dorsally. Median and posterior regions present. Segments in the former with bilobed, 
foliaceous dorsal processes, each carrying several capillary bristles ; number of segments in 
the median region variable. Dorsal division of the foot forms a single conical lobe with 
bristles. Tooth-like bristle in the fourth segment. Hooks minute, translucent ; somewhat 
conical, with a long, curved, minutely serrated anterior margin ; posterior border concave ; 
base convex in front, concave posteriorly. More than one individual in the same system 
of tubes, which are reptant, often parallel, with occasionally short lateral connections. 
PHYLLOCHATOPTERUS ANGLICUS, Potts, 1914. Plate CX X XVI, figs. 12 and 12a—large bristle 
and hook. 
Specific Characters—Head (prostomium) rather broad, though small, its borders with 
a line of dark pigment ; eyes on the extreme sides of the head, and are overlapped and hidden 
230 
