OBTAINED DURING THE CRUISE OF H.M.S. 'VALOROUS.' 503 



developed in the lower group, which also have a claw at the tip. The latter process is 

 indistinct in the delicately tapered superior series. The cuticle of the foot has many 

 cylindrical papilla?; and similar organs occur on the dorsal and ventral cirri, those 

 on the latter, however, being less marked. The relationships of this form are not easily 

 made out ; for while agreeing in some respects with the form of the head in such as 

 Microsyllis, it wholly differs in other points, so that it is only provisionally ranged 

 amongst the Syllidse. 



Nereis zonata, Mahngren. Station 1, 175 fathoms, in sandy mud, off Hare Island, 

 Disco ; Station 3, 100 fathoms, on a similar bottom. In a large male example a peculiar 

 change occurs in the bristles ; for besides the ordinary kind, toward the anterior third 

 of the body, a dense tuft of translucent bristles exists in each division of the foot. In 

 shape these resemble the tips of the Heteronereis forms, though they are only partially 

 developed, the tips alone projecting through the skin, while the shafts form a dense 

 mass in the neighbourhood of the spine. The distal division of these bristles (fig. 4) 

 resembles the blade of a sword, with a finely serrate edge, and tapering to an acute point, 

 which is slightly prolonged in a filiform manner. Moreover, a tendency to the foliaceous 

 condition of the feet accompanies the appearance of the Heteronereis-bvistles, processes 

 appearing at the base of the dorsal cirri, a foliaceous growth at the inferior bristle- 

 papilla, and a process on each side of the ventral cirrus. Such, as usual, are best 

 marked posteriorly. The specimens are tinted with fine reddish-brown bars. 



Nereis pelagica, L. Station 4, 20 fathoms, shell-sand ; Station 5, 60 fathoms, on sand 

 and shells ; Station 6, 410 fathoms, in sandy mud ; Godhavn Harbour, 5-20 fathoms ; 

 H.M.S. ' Alert,' Station 1, 65° 00' N., 53° 00' W., 30 fathoms, on a rocky and gravelly 

 bottom. 



Lumbriconereis fragilis, O. E. Miiller. Station 1, 175 fathoms, off Hare Island, 

 Disco ; Stations 3 and 6, ut antea ; Station 7, 63° 9' N., 56° 43' W., 1100 fathoms, on a 

 bottom of mud ; Station 16, in 1785 fathoms, in Globigerina-ooze ; outside Godhavn 

 Harbour, 5-20 fathoms. This species, common in Britain, has hardly been differentiated 

 in the Catalogue of the British Museum from the abundant southern type Notocirrus 

 tricolor, Mont. 



Nothria conchylega, Sars. Stations 1, 3, 5, ut antea. The specimens are large and 

 in very firm tubes of small pebbles, very similar to those from the Gulf of St. Law- 

 rence. The British examples have tubes composed of flat bivalves, fragments of Echino- 

 derm-tests, &c. 



Glycera capitata, (Erst. Stations 4 and 7 ; Station 9, 59° 10' N., 50° 25' W., in 1750 

 fathoms, and on a muddy bottom. 



Glycera setosa, (Erst. On the surface of the sea at Kitenbenk Kulbrud, Waigat 

 Strait ; a fragment from Station 4. This form is readily distinguished by the great 

 length of the feet and bristles and by the structure of both. The nerve-trunks are 

 rounded and more distinctly separated than usual in the group. The longitudinal 

 ventral muscles do not seem quite to cover the trunks in the soft preparation, though 

 a thin layer of tissue does. 



3x2 



