NEEEIS CTJLTBIFERA. 285 



be slightly opaque to the naked eye. In the fluid were also many of the larger cells with 

 coarsely granular contents. A few of the elongated coelomic corpuscles were still visible. 

 There were also a few ova. Such a condition raises the question as to the changes in the 

 fluid after confinement. In a dying example the fluid abounded with disintegrating cells 

 and granules, but the perivisceral corpuscles proper were few. There were also groups 

 of circular pellucid cells, and ova with nuclei and nucleoli, surrounded by the smaller cells. 

 Some of the bodies showed a punctate zone, which may have been connected with 

 Gregarinee, having a thickened anterior end. It is a large broad form. The fatty globules 

 in the eggs of the annelid are remarkably large, whereas the granules in the parasitic (P) 

 bodies are small. De St. Joseph 1 found gregarines in other forms, such as N. Biimerilii. 



The first foot (Plate LXXI, fig. 8) is distinguished from that of N. pelagica by the 

 greater development of the upper and lower lobes and the rudimentary condition of the 

 setigerous lobe. The dorsal edge of the foot is more prominent, but the cirrus is some- 

 what shorter. The dorsal lobe is larger and more pointed, and the same may be said of 

 the inferior lobe, which is, however, less acute. The setigerous or median lobe offers a 

 marked contrast to the corresponding part in N. pelagica, since it is much less prominent. 

 The ends of the upper long-tipped homogomph bristles are shorter, whilst those of the 

 lower series are somewhat longer. The ventral cirrus is shorter. Both species have 

 black spines. 



At the tenth foot (Plate LXXI, fig. 8 a) the dorsal cirrus is shorter, the upper lobe 

 more triangular in lateral view, and the distance between the dorsal edge and the first 

 bristle-bundle greater than in N. pelagica. Moreover, a small but distinct superior 

 setigerous lobe is present — none being visible in N. pelagica. The inferior setigerous 

 lobe is less acute than in the latter, and the ventral cirrus is less in proportion to the 

 bulk of the foot, and it extends outward only to the middle of the great ventral lobe. 

 The bristles of the dorsal process have long, slender, serrated tips, as in N. pelagica, but 

 the transverse strias of their shafts are bolder and less regular (Plate LXXXI, fig. 1 a). 

 The bristles with the shorter tips in the inferior division (Plate LXXXI, fig. 1), while 

 somewhat similar to those of N. pelagica, have a more decided curve at the base of the 

 terminal piece, and the spinous region, like the whole structure, is shorter. The trans- 

 verse lines or cameras in the centre of the shaft are less regular than in N. pelagica. The 

 tip in both shows a slight differentiation, indicated by a line within the margin. 



In the thirty- seventh foot (Plate LXXI, fig. 8 b) the two upper lobes are proportion- 

 ally longer than in N". pelagica, and they have a wider space between them, since a minute 

 spinigerous process separates them. The dorsal cirrus is considerably shorter and 

 smaller. The inferior setigerous lobe is somewhat less, while the ventral lobe is more 

 deeply cleft superiorly, and thus appears to be longer. The ventral cirrus, like the 

 dorsal, is both shorter and smaller than in N. pelagica. 



At the fifty-seventh foot the enlargement of the dorsal region is even more marked, 

 and the cirrus is carried further outward. In shape, however, the dorsal lobe and all the 

 others conform to the condition just described. 



Towards the tip of the tail (Plate LXXI, fig. 8 c) the enlargement of the dorsal 

 region has altered the shape of the foot, since the dorsal lobe in lateral view occupies 



1 ' Ann. Sc. Nat./ 7 C sei\, t. xx, p. 215. 



