REPORT ON THE ANNELIDA. 
275 
in Eunice norvegica. Superiorly is tlie usual brownish, granular region, which stretches 
downward at each side. In some sections a bar of pigment occurs below the neural 
canal. The examples from Marion Island and Station 49 differ from the foregoing in 
having the neural canal widely dilated, so that the brownish opaque region superiorly 
forms a wall to the canal, but this difference is probably evanescent. In all the 
specimens the cuticle is somewhat thick. 
This Eunice seems to come near the Eunice oerstedi of Stimpson, the chief difference 
being the number of divisions in the branchise, which Stimpson states is five. The 
Eunice macrocliceta of Schmarda^ is also a closely allied form procured on the southern 
shores of Jamaica. It has similar branchiae of three or four divisions. The dorsal cirri, 
however, are very short, whereas in Eunice oerstedi they are long. 
Eunice vittata, Delle Chiaje (PI. XXXIX. fig. 18 ; PL XXIa. figs. 10, 11). 
Nereis vittata, Delle Chiaje, Memorie, yoI. iv. p. 195, 1829; Descrizione e Notom., p. 101, pi. cvi. fig. 12. 
Habitat. — Dredged at Station 162 (off East Moncoeur Island, Bass Strait), April 2, 
1874; lat. 39° 10' 30" S., long. 146° 37' E. ; depth, 38 fathoms; surface temperature, 
63°'2 ; sea-bottom, sand and shells. 
This is evidently a young form, measuring about 18 mm. in length and about 1 mm 
in diameter anteriorly. It is allied to the foregoing species, though 
there are certain evident differences. 
The head has the tentacles and tentacular cirri distinctly annulated, 
at considerable intervals. The two anterior lobes (palpi) are well 
marked. The dental apparatus (Fig. 36) is pale, and the maxillse much 
curved, features apparently common to immature forms. There are six 
teeth at least in the great dental plates. Three prominent teeth appear 
on the left lateral paired plate ; at least six on the unpaired of that side, 
and this is also proportionally large, almost as large as the left great 
plate. The right lateral has at least seven teeth. The apparatus is 
too minute for other than microscopic discrimination, and hence the 
difficulty in regard to the curved plates. The dental apparatus on 
the whole corresponds with that of Eunice vittata. 
The branchiae are represented on the third foot by a simple filament, which increases 
to two and a rudimentary third on the tenth foot, three on the twentieth foot 
(PI. XXXIX. fig. 18), and this seems to be the maximum. The branchiae have two 
branches on the thirtieth foot. These organs are somewhat elongated, like those of Eunice- 
limosa, Ehlers, and of similar (slightly tapered) shape. They are richly ciliated. 
* Neue wirbell. Tliiere, I. ii. p. 128. 
Fig. 36. — Maxill® and 
dental plate of Eunice 
vittata; X 40 diameters. 
