from the North Sea and adjacent parts. 291 



tlie description as laid down in tlic Monograph*. The 

 dorsal cirri are long and articulated, but the articulations 

 diminish from bcFore backward until, in the caudal region, 

 only twelve or less are found. These organs all taper 

 distally and are quite distinct from the ventral cirri, which 

 likewise taper distally, but which are sausage-shaped through- 

 out. In certain varieties, however, it is noteworthy that the 

 ventral cirri are often elongate. 



The proboscis, which is extruded in the complete specimen, 

 appears to be divided into a basal and a distal region by a 

 deep furrow. The basal region is the larger and is uniform 

 except at the base, where several small grooves occur. The 

 distal region is more rounded and swollen, but is smooth in 

 appearance. The organ is about the length of five body- 

 segments and resembles the body in colour except where 

 here and there little patches of white appear. None of the 

 specimens were mature. 



The last body-segment is not so broad as the segments in 

 front, but is much longer. It is somewhat oblong in outline 

 and ends in two cirri, which are about half the length of the 

 dorsal cirri of the second last segment. The cirri are indis- 

 tinctly articulated, the articulations being irregular in size. 

 At the anterior region of the last segment there are many 

 sausage-shaped papillne, w'hicli dwindle in size towards the 

 posterior end. The anus is ventral in position, and close to 

 it there is a small papilla intermediate in position between 

 the anal cirri. 



Sijllis armillaris, CErsted, 1812-3. 



This species is represented bv a single fragment which was 

 found in a dredge at Station Zj'lat. 61° 06' N., long. 2° I'E., 

 at a depth of 15 fathoms. It is common, however, in the 

 littoral regions of our coasts and has been found in debris 

 from deep-sea fishing. It extends to Faroe channel, shores 

 of Norway and Sweden, Greenland, and has been found by 

 Marenzeller in the Bchring Sea. 



The head is typical and agrees with the characters in the 

 jNIonograph. 



The body is slightly wedge-shaped and there are about 

 forty segments in this fragment. In the Monograph it 

 is stated : " Body two or three inches long and of sixty to 

 seventy segments, slightly diminished in front, tapering to a 

 lanceolate point posteriorly and furnisbed with two cirri." 

 It is yellowish brown, but the lateral and central bars are 



* Tide ' Monograph/ vol. ii. part i. p. 201. 



