REPOET ON THE ANNELIDA. 
370 
length, and the diameter is about 1 mm. The specimen is too incomplete for 
rej)resentation. Along with it were, several other Annelids, besides fishes and Crustacea,, 
so that the ground seems to have been rich. 
The anterior region of the body agrees, with that in the ordinary form in having 
nine segments. The first three bristle-rows differ from those of Phyllochcetopteruti 
claperedii in having shorter bristles with much more expanded terminal regions. They 
begin dorsally by a few with narrower tips, the latter gradually increasing in breadth, 
as well as becoming more decidedly asymmetrical as we proceed downward. The fourth 
segment shows a series of elongated stoutish bristles culminating in the strong ones, and 
presenting the single great spine (sometimes tooth-like) as in other species (PI. XXIIIa. 
fig. 19). The tips of the latter organs are bevelled and shouldered. In this foot there 
are also the usual varieties of winged bristles, some with very Ijroad extremities 
(PI. XXIIIa. fig. 20). 
The snout of the form is as 5 ^mmetrical, apparently from injury, the usual horse-shoe 
shaped anterior process being cleft in the middle line ventrally, and having only a com- 
paratively small process on the left, instead of the broad frill present on the right side. 
A considerable central protuberance exists dorsally with a smaller papilla at each side, the 
latter probably representing the processes at the base of the tentacles in the ordinary 
form. 
The first segment of the middle region of the body presents laterally a ventral pad, 
with a long dorsal papilla, somewhat enlarged at the tip, superiorly. It thus differs from 
the wing of Spioclicetopterus typicus. 
Little can be said concerning the rest of the animal, except that the long clavate 
dorsal papillae occur as in the ordinary form in the posterior division. They are 
supported internally by very fine simple bristles, the acute tips of which slightly project 
externally. 
The apparently abnormal condition of the snout of this specimen renders the 
diagnosis of its exact position uncertain, but, so far as can be observed, it comes nearest 
Ranzania. None of the posterior hooks were visible. The Ranzania sagittaria of 
Claparede was discovered by him in the Bay of Naples, living, as in the present case, 
in tubes composed of grains of sand. The absence of the long tentacles characteristic 
of the allied genera is a striking feature. 
Spiochcetopterus, Sars. 
Spiochcetopterus ? 
Habitat . — The only other representatives of the group are certain yellowish hyaline 
tubes dredged at Station 45 (off the coast of New York), May 3, 1873 ; hit. 38° 34' N., 
