334 
THE VOYAGE OF H.M.S. CHALLENGER. 
The tube of this form is composed of a delicate hyaline secretion coated with greyish 
muddy sand, and it is rather friable. Sars found his specimens at a depth of 120 
fathoms, but the present example goes considerably deeper. 
Nothriaminuta, n. sp. (PI. XL. fig. 4 ; PI. XXIa. figs. 17, 18). 
Habitat. — Trawled at Station 169 (off East Cape, North Island, New Zealand), July 
10, 1874; lat. 37° 34' S., long. 179° 22' E. ; depth, 700 fathoms; bottom temperature 
40° ‘0, surface temperature 58°'2 ; sea-bottom, blue mud. 
A minute species measuring about 20 mm. in length and a little more than half a 
millimetre in breadth. 
The median tentacle is comparatively short, only a little longer than the external 
lateral. The pair next the median are of considerable 
length. The palpi are thick and blunt, almost 
globular. No eyes are present. 
The dental apparatus (Fig. 87) is comparatively 
pale. The maxillae are broad posteriorly, strongly 
curved anteriorly. The left great dental plate differs 
from the ordinary structure in Hyalinoecia, in possess- 
ing very large anterior teeth. It is true the first does 
not reach the proportions in such as Nothria pycno- 
hranchiata and allies, but it sufficiently diverges from 
any ordinary Hyalinoecia. There are only six teeth 
in this plate, the first three being very large, the 
second and third occupying about a third of the total 
length of the plate. The right great dental plate 
shows eight teeth, but the size of the anterior teeth is 
not disproportionate, as on the other side. The left 
lateral paired plate is crushed, the unpaired has about 
eight teeth. The right lateral plate presents six or 
seven teeth. Unfortunately the mandibles also are 
crushcd, and all that can be said is that a dark pigment- 
stripe occurs on each side of the symphysis. 
The dorsal cirri anteriorly are comparatively short and thick. No branchise are 
visible. 
The first foot quite differs in develojdment from Hyalinoecia tuhicola, and bears 
a series of much curved bristles (PI. XXIa. fig. 17) which have no articulations. 
