EEPORT ON THE ANNELIDA. 
431 
series of bristles is of moderate length. These are less tapered than in specimens from St. 
Magnus Bay. but more slender than those from Canada and Bergen. The lateral 
bristles, which are seventeen in number, agree most nearly with the former. The tips 
differ slightly from those of Amphicteis sarsi. 
There are fifteen hook -bearing pinnules posteriorly, but the tip of the tail is absent. 
The hooks (PL XXVIIa. fig. 2) show five teeth and a process beneath the inferior one. 
They seem to be comparatively minute, and their outline differs both in the dorsal curve 
and the anterior inferior process from that of any other known species. The closeness 
with which this and allied forms approach each other, and yet the fixed nature of the 
differences in the minute structure of the hooks, is interesting. 
A pure white pulp filled the alimentary canal of the animal. Microscopically a vast 
number of Diatoms, Kadiolarians, forked structures with a spike at the end (like the tips 
of the cylinders formerly described in Maldane sarsi (p. 393), only with a shorter spike 
and larger basal region), and a few small Globigerince were the chief forms observed in 
this rich ooze. The Globigerince appeared to be in very good condition, and were 
probably fresh when swallowed, the fiue spines in some cases radiating all round like 
hairs, and the interior apparently still filled with the protoplasm. There seems to me to 
be no valid reason why these Foraminifera, Eadiolarians, and other forms should not live 
on the bottom any more than the arenaceous types or the Annelid itself, concerning 
which no manner of doubt exists. 
No trace of a tube exists in the preparation. 
Amphicteis japonica, n. sp. (PI. XXVIIa. figs. 3-5). 
Habitat. — Dredged at Station 232 (south of Yedo, Japan), May 12, 1875; lat. 
35° 11' ,N., long. 139° 28' E.; depth, 345 fathoms; bottom temperature 41°‘0, surface 
temperature 64° '2 ; sea-bottom, green mud. 
The length of the example is about 28 mm., with a diameter in front of 2 ‘5 mm. 
In general appearance it corresponds with Amphicteis gunneri, having seventeen pairs 
of bristle-tufts in front and fifteen pairs of hook-bearing pinnules posteriorly. The 
paleolae are of moderate length and nearly straight, the more slender only exhibiting a 
slight curvature. They differ from the corresponding organs in a typical example of 
Amphicteis gunneri from Norway (PI. XXVIIa. fig. 4), both in regard to the character 
of the tapering and the general outline, which is somewhat fusiform (PI. XXVIIa. fig. 3). 
They are marked by the usual longitudinal striae. The traces of wings are less evident 
in these than in the Norwegian species, the bristle-tips of which are tapered to a degree 
of extreme tenuity. The lateral bristles present no feature of note, except perhaps that 
the wings are rudimentary. 
