REPOET 0^^ THE ANNELIDA. 
327 
Moreover, a large empty curved tube (of unknown relations) from the same series is 
protected by the spines of Echinoderms in a similar manner to tlie foregoing. It came 
from Port Darwin, at a depth of 7 to 12 fathoms. 
Nothria ehlersi} n. sp. (PL XLII. figs. 1-3 ; PI. XXVIa. figs. 5-7 ; PL XXXVa. fig. 2). 
Habitat . — Dredged at Station 298 (off the South American coast, a little south of 
Valparaiso), November 17, 1875 ; lat. 34° 7' S., long. 73° 56' W. ; depth, 2225 fathoms; 
bottom temperature 35°'6, surface temperature 59°‘0 ; sea-bottom, blue mud. Also 
at Station 299, December 14, 1875 ; lat. 33° 31' S., long. 74° 43' W.; depth, 2160 
fathoms ; bottom temperature, 35°‘2 ; surface temperature, 62°'0 ; sea bottom, blue mud. 
A form of great length, but from the fact that the specimens have been preserved 
in situ in their tough elongated tubes without the frequent changes of spirit necessary 
Fig. 81. — Maxillae and dental plates of Nothria ehlersi, n. sp.; x 24 diameters. 
Fig. 82. — Spathulate posterior region of another specimen, showing the variahility of the thinner marginal region ; 
X 24 diameters. 
Fig. 83. — Mandibles of the same species, from the ventral aspect ; x 24 diameters. 
in such a case, they are imperfectly represented posteriorly. One example measures 
170 mm. in length, with a diameter of 2 ’5 mm. anteriorly, and this is probably the 
average size. 
The head is characterised by having a shorter median than lateral tentacles, whereas 
in the former species the reverse is the case. In the present form the short median 
1 Named in honour of Prof. Ehlers of Gottingen. 
