1898. 



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1907. 



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1908. 



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1909. 



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BRADA VILLOSA. 105 



osa, Michaelsen. Gronland Annel., p. 129. 



Fauvel. Bull. Inst. Ocean., No. 107, p. 22, 



Mcintosh. Ann. Nat. Hist., ser, 8, vol. ii, pp. 538, 540, and 541. 



Moore. Proc. Acad. Nat. Sc. Philad., vol. xl, p. 357. 



Fauvel. Bull. Inst. Ocean., No. 142, p. 6. 



Habitat— Dredged in the ' Porcupine ' Expedition of 1870 at Station 8 on the Channel 

 Slope in 257 fathoms amidst a northern fauna. Also dredged in the ' Knight Errant ' 

 August 17th 5 1880, at a depth of 540 fathoms at Station 8. 



Abroad it extends to Spitzbergen, Norway, Sweden, and Finmark, and northern 

 seas generally (Malmgren, Norman, Fauvel) ; Greenland (Michaelsen). 



Arctic Sea (Marenzeller) and Pacific coast of North America (Moore). 



The anterior end (Plate XCV, fig. 12, and Plate XCVI, fig. 6) is bluntly rounded, 

 and the feeble development of the frontal bristles, for instance, in contrast with those of 

 8. plumosa, indicates a difference in surroundings, the present form probably inhabiting 

 soft mud in deep water. The anterior aperture has a broad arch superiorly, the margin 

 being papillose, whilst the posterior lip is deeply sinuous ventrally, the whole forming a 

 large opening with a broad pouting rim ventrally. In this aperture lie the two broad 

 crenate and grooved palpi, and above them the slender branchiae. 



Body fusiform, tapered anteriorly, and more distinctly posteriorly, where it ends in a 

 bluntly-conical tail with the anus in the centre. Three diminishing smooth rings occur 

 behind the last bearing bristles. The dorsum is rough, with long papillae (Plate 

 XCVI, fig. 6 b) and sand-grains ; the ventral surface is less rough anteriorly in the 

 enlarged region, the sand-grains being smaller, and the same may be said of the posterior 

 half. Both offer a contrast to the rougher dorsal surface. The bristled segments are in 

 the large example forty-six in number. The frontal bristles of the first pair are very 

 slender and inconspicuous (Plate XCV, fig. 12, and Plate XCVI, fig. 6), and do not 

 extend forward the breadth of the body. They are pale, tapering bristles, with long 

 points and very fine hair-like tips. The bristles of this region, therefore, are in contrast 

 with the long, clavate papillae which fringe the same margin. The dorsal bristles of the 

 second series are still shorter and equally slender, but they are directed forward and 

 slightly outward. The ventral on the other hand have assumed the characteristic stout 

 shafts and finely-tapered tips of those on the rest of the body, and the bristles spring from 

 a smooth, conical setigerous process with long clavate papillae at its base. The remark- 

 able prominence of the ventral division of the foot throughout the entire length is note- 

 worthy. The third series presents short dorsal bristles of the same character, and the 

 prominent ventral process has a stiff set with curved and tapered points. The ventral 

 series throughout consists of rather long, stout, closely articulated bristles with very finely 

 tapered and curved tips (Plate Oil, fig. 2 a), devoid of articulations. Both bristles and 

 hooks are proportionally better developed in the narrower posterior region in front of the 

 tail. 



Embedded between the fourth and fifth segments on the ventral surface is a cylin- 

 drical or slightly-flattened structure (genital papilla) with a smoothly rounded free end, 

 the other being inserted into the muscular walls of the body (Plate XCVI, fig. 12). 

 Whilst the distal part of the structure is smooth, the lower half appears to have a coating 



137 



