NARRATIVE OF THE CRUISE. 
633 
demonstrate that branching tubes by no means indicate a divided condition of the 
Annelid. 
“ From a depth of 1950 fathoms in the Antarctic Ocean 
an equally peculiar example of the Chlorsemidse occurs. 
This form ( Tr aphonia, wyvillei, n. sp., fig. 216) is large 
and broadly elliptical, the long pale papillae which cover its 
surface giving it the aspect of grey plush or loose felt. 
These papillae are densely coated with the siliceous organisms 
of the Diatom ooze, besides having these loose in the 
interstices. The oral aperture is ventral, and has two large 
foliaceous tentacles, which in life must have approached a 
circular outline. The branchiae are clavate, and like the 
tentacles tinted of a pale brown colour. The anus is also 
ventral, and is situated a little within the posterior border. 
The beautiful tufts of pale golden bristles which flank the 
sides are twenty-two in number ; the ventral, in the case 
of all except the first, being stronger and much more con- 
spicuous than the dorsal. 
“ The wide range and peculiar form of another member 
of the Chlorsemidse, viz., Flabelligera (?) abyssorum, n. sp., 
frequenting the abysses of the Atlantic and Pacific, opens 
up the question as to ancestral forms being driven into the 
still depths by commoner and more hardy types. Unfor- 
tunately all the specimens, though of considerable size, are 
fragmentary, but it is probable that the type is inter- 
mediate between the Chlorsemidse and the Chsetopteridse. 
The anterior end of this remarkable Annelid (fig. 217) is 
formed by the dark brownish muscular lip, which is convex 
dorsally, concave ventrally, thus forming a horse-shoe-like 
projection. The upper and posterior angles run into a 
double foliaceous and somewhat frilled brownish mass 
which constitutes the superior boundary of the oral aper- 
ture. Close behind the latter is a stout process having a 
median filament with an enlargement at the tip, and two 
lateral processes considerably shorter and with fi l i f orm 
extremities. The feet have long delicate flattened dorsal 
bristles which possess a sheen like spun glass, and articula- 
tions so large as to be visible under a lens. These tufts extend outward about 18 mm. 
The ventral bristles are equally translucent but devoid of articulations. The hyaline 
Fig. 216 . — Trophonvi wyvillei, 
Station 167, March 3, 1874 
fathoms. 
